Home / 19,431.13-29,102.85-13,613.71

Finding the Fourth Proportional to 19,431.13, 29,102.85 and 13,613.71

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Solution

The fourth proportional to 19,431.13, 29,102.85 and 13,613.71 is: 20,389.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,431.13 : 29,102.85 = 13,613.71 : x
  2. Step 2: Convert to fraction form
    19,431.13/29,102.85 = 13,613.71/x
  3. Step 3: Cross multiply
    19,431.13x = 29,102.85 × 13,613.71
  4. Step 4: Simplify right side
    19,431.13x = 396,197,760.07
  5. Step 5: Solve for x
    x = 396,197,760.07/19,431.13
  6. Step 6: Final answer
    x = 20,389.85

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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.