Home / 21,585.24-29,780.78-12,151.98

Finding the Fourth Proportional to 21,585.24, 29,780.78 and 12,151.98

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Solution

The fourth proportional to 21,585.24, 29,780.78 and 12,151.98 is: 16,765.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,585.24 : 29,780.78 = 12,151.98 : x
  2. Step 2: Convert to fraction form
    21,585.24/29,780.78 = 12,151.98/x
  3. Step 3: Cross multiply
    21,585.24x = 29,780.78 × 12,151.98
  4. Step 4: Simplify right side
    21,585.24x = 361,895,442.94
  5. Step 5: Solve for x
    x = 361,895,442.94/21,585.24
  6. Step 6: Final answer
    x = 16,765.88

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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.