Home / 20,641.57-28,488.07-11,690.83

Finding the Fourth Proportional to 20,641.57, 28,488.07 and 11,690.83

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Solution

The fourth proportional to 20,641.57, 28,488.07 and 11,690.83 is: 16,134.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.57 : 28,488.07 = 11,690.83 : x
  2. Step 2: Convert to fraction form
    20,641.57/28,488.07 = 11,690.83/x
  3. Step 3: Cross multiply
    20,641.57x = 28,488.07 × 11,690.83
  4. Step 4: Simplify right side
    20,641.57x = 333,049,233.62
  5. Step 5: Solve for x
    x = 333,049,233.62/20,641.57
  6. Step 6: Final answer
    x = 16,134.88

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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.