Home / 20,641.55-28,484.76-11,689.90

Finding the Fourth Proportional to 20,641.55, 28,484.76 and 11,689.90

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Solution

The fourth proportional to 20,641.55, 28,484.76 and 11,689.90 is: 16,131.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.55 : 28,484.76 = 11,689.90 : x
  2. Step 2: Convert to fraction form
    20,641.55/28,484.76 = 11,689.90/x
  3. Step 3: Cross multiply
    20,641.55x = 28,484.76 × 11,689.90
  4. Step 4: Simplify right side
    20,641.55x = 332,983,995.92
  5. Step 5: Solve for x
    x = 332,983,995.92/20,641.55
  6. Step 6: Final answer
    x = 16,131.73

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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.