Home / 20,781.06-28,677.42-11,349.66

Finding the Fourth Proportional to 20,781.06, 28,677.42 and 11,349.66

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Solution

The fourth proportional to 20,781.06, 28,677.42 and 11,349.66 is: 15,662.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.06 : 28,677.42 = 11,349.66 : x
  2. Step 2: Convert to fraction form
    20,781.06/28,677.42 = 11,349.66/x
  3. Step 3: Cross multiply
    20,781.06x = 28,677.42 × 11,349.66
  4. Step 4: Simplify right side
    20,781.06x = 325,478,966.68
  5. Step 5: Solve for x
    x = 325,478,966.68/20,781.06
  6. Step 6: Final answer
    x = 15,662.29

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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.