Home / 14,208.60-21,312.90-7,987.80

Finding the Fourth Proportional to 14,208.60, 21,312.90 and 7,987.80

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Solution

The fourth proportional to 14,208.60, 21,312.90 and 7,987.80 is: 11,981.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,208.60 : 21,312.90 = 7,987.80 : x
  2. Step 2: Convert to fraction form
    14,208.60/21,312.90 = 7,987.80/x
  3. Step 3: Cross multiply
    14,208.60x = 21,312.90 × 7,987.80
  4. Step 4: Simplify right side
    14,208.60x = 170,243,182.62
  5. Step 5: Solve for x
    x = 170,243,182.62/14,208.60
  6. Step 6: Final answer
    x = 11,981.70

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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.