Home / 21,155.43-29,186.28-13,600.71

Finding the Fourth Proportional to 21,155.43, 29,186.28 and 13,600.71

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Solution

The fourth proportional to 21,155.43, 29,186.28 and 13,600.71 is: 18,763.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.43 : 29,186.28 = 13,600.71 : x
  2. Step 2: Convert to fraction form
    21,155.43/29,186.28 = 13,600.71/x
  3. Step 3: Cross multiply
    21,155.43x = 29,186.28 × 13,600.71
  4. Step 4: Simplify right side
    21,155.43x = 396,954,130.26
  5. Step 5: Solve for x
    x = 396,954,130.26/21,155.43
  6. Step 6: Final answer
    x = 18,763.70

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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.