Home / 28,003,424.60-42,005,136.90-21,200,979.80

Finding the Fourth Proportional to 28,003,424.60, 42,005,136.90 and 21,200,979.80

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Solution

The fourth proportional to 28,003,424.60, 42,005,136.90 and 21,200,979.80 is: 31,801,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,003,424.60 : 42,005,136.90 = 21,200,979.80 : x
  2. Step 2: Convert to fraction form
    28,003,424.60/42,005,136.90 = 21,200,979.80/x
  3. Step 3: Cross multiply
    28,003,424.60x = 42,005,136.90 × 21,200,979.80
  4. Step 4: Simplify right side
    28,003,424.60x = 890,550,058,913,134.62
  5. Step 5: Solve for x
    x = 890,550,058,913,134.62/28,003,424.60
  6. Step 6: Final answer
    x = 31,801,469.70

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.