Home / 21,332.59-29,439.12-12,385.42

Finding the Fourth Proportional to 21,332.59, 29,439.12 and 12,385.42

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Solution

The fourth proportional to 21,332.59, 29,439.12 and 12,385.42 is: 17,091.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,332.59 : 29,439.12 = 12,385.42 : x
  2. Step 2: Convert to fraction form
    21,332.59/29,439.12 = 12,385.42/x
  3. Step 3: Cross multiply
    21,332.59x = 29,439.12 × 12,385.42
  4. Step 4: Simplify right side
    21,332.59x = 364,615,865.63
  5. Step 5: Solve for x
    x = 364,615,865.63/21,332.59
  6. Step 6: Final answer
    x = 17,091.96

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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.