Home / 21,125.12-29,152.56-11,565.88

Finding the Fourth Proportional to 21,125.12, 29,152.56 and 11,565.88

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Solution

The fourth proportional to 21,125.12, 29,152.56 and 11,565.88 is: 15,960.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.12 : 29,152.56 = 11,565.88 : x
  2. Step 2: Convert to fraction form
    21,125.12/29,152.56 = 11,565.88/x
  3. Step 3: Cross multiply
    21,125.12x = 29,152.56 × 11,565.88
  4. Step 4: Simplify right side
    21,125.12x = 337,174,937.77
  5. Step 5: Solve for x
    x = 337,174,937.77/21,125.12
  6. Step 6: Final answer
    x = 15,960.85

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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.