Home / 21,478.76-29,663.22-14,781.68

Finding the Fourth Proportional to 21,478.76, 29,663.22 and 14,781.68

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Solution

The fourth proportional to 21,478.76, 29,663.22 and 14,781.68 is: 20,414.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,478.76 : 29,663.22 = 14,781.68 : x
  2. Step 2: Convert to fraction form
    21,478.76/29,663.22 = 14,781.68/x
  3. Step 3: Cross multiply
    21,478.76x = 29,663.22 × 14,781.68
  4. Step 4: Simplify right side
    21,478.76x = 438,472,225.81
  5. Step 5: Solve for x
    x = 438,472,225.81/21,478.76
  6. Step 6: Final answer
    x = 20,414.22

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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.