Home / 21,125.38-29,156.15-12,171.18

Finding the Fourth Proportional to 21,125.38, 29,156.15 and 12,171.18

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Solution

The fourth proportional to 21,125.38, 29,156.15 and 12,171.18 is: 16,798.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.38 : 29,156.15 = 12,171.18 : x
  2. Step 2: Convert to fraction form
    21,125.38/29,156.15 = 12,171.18/x
  3. Step 3: Cross multiply
    21,125.38x = 29,156.15 × 12,171.18
  4. Step 4: Simplify right side
    21,125.38x = 354,864,749.76
  5. Step 5: Solve for x
    x = 354,864,749.76/21,125.38
  6. Step 6: Final answer
    x = 16,798.03

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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.