Home / 21,520.68-29,690.24-15,868.86

Finding the Fourth Proportional to 21,520.68, 29,690.24 and 15,868.86

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Solution

The fourth proportional to 21,520.68, 29,690.24 and 15,868.86 is: 21,892.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.68 : 29,690.24 = 15,868.86 : x
  2. Step 2: Convert to fraction form
    21,520.68/29,690.24 = 15,868.86/x
  3. Step 3: Cross multiply
    21,520.68x = 29,690.24 × 15,868.86
  4. Step 4: Simplify right side
    21,520.68x = 471,150,261.93
  5. Step 5: Solve for x
    x = 471,150,261.93/21,520.68
  6. Step 6: Final answer
    x = 21,892.91

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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.