Home / 21,125.92-29,156.84-12,171.68

Finding the Fourth Proportional to 21,125.92, 29,156.84 and 12,171.68

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Solution

The fourth proportional to 21,125.92, 29,156.84 and 12,171.68 is: 16,798.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.92 : 29,156.84 = 12,171.68 : x
  2. Step 2: Convert to fraction form
    21,125.92/29,156.84 = 12,171.68/x
  3. Step 3: Cross multiply
    21,125.92x = 29,156.84 × 12,171.68
  4. Step 4: Simplify right side
    21,125.92x = 354,887,726.29
  5. Step 5: Solve for x
    x = 354,887,726.29/21,125.92
  6. Step 6: Final answer
    x = 16,798.69

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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.