Home / 20,125.17-27,764.10-12,162.78

Finding the Fourth Proportional to 20,125.17, 27,764.10 and 12,162.78

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Solution

The fourth proportional to 20,125.17, 27,764.10 and 12,162.78 is: 16,779.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.17 : 27,764.10 = 12,162.78 : x
  2. Step 2: Convert to fraction form
    20,125.17/27,764.10 = 12,162.78/x
  3. Step 3: Cross multiply
    20,125.17x = 27,764.10 × 12,162.78
  4. Step 4: Simplify right side
    20,125.17x = 337,688,640.20
  5. Step 5: Solve for x
    x = 337,688,640.20/20,125.17
  6. Step 6: Final answer
    x = 16,779.42

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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.