Home / 21,139.20-29,169.12-11,708.32

Finding the Fourth Proportional to 21,139.20, 29,169.12 and 11,708.32

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Solution

The fourth proportional to 21,139.20, 29,169.12 and 11,708.32 is: 16,155.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.20 : 29,169.12 = 11,708.32 : x
  2. Step 2: Convert to fraction form
    21,139.20/29,169.12 = 11,708.32/x
  3. Step 3: Cross multiply
    21,139.20x = 29,169.12 × 11,708.32
  4. Step 4: Simplify right side
    21,139.20x = 341,521,391.08
  5. Step 5: Solve for x
    x = 341,521,391.08/21,139.20
  6. Step 6: Final answer
    x = 16,155.83

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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.