Home / 21,171.60-29,220.48-12,217.59

Finding the Fourth Proportional to 21,171.60, 29,220.48 and 12,217.59

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Solution

The fourth proportional to 21,171.60, 29,220.48 and 12,217.59 is: 16,862.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.60 : 29,220.48 = 12,217.59 : x
  2. Step 2: Convert to fraction form
    21,171.60/29,220.48 = 12,217.59/x
  3. Step 3: Cross multiply
    21,171.60x = 29,220.48 × 12,217.59
  4. Step 4: Simplify right side
    21,171.60x = 357,003,844.24
  5. Step 5: Solve for x
    x = 357,003,844.24/21,171.60
  6. Step 6: Final answer
    x = 16,862.39

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.