Home / 20,613.52-28,438.54-12,641.90

Finding the Fourth Proportional to 20,613.52, 28,438.54 and 12,641.90

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Solution

The fourth proportional to 20,613.52, 28,438.54 and 12,641.90 is: 17,440.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.52 : 28,438.54 = 12,641.90 : x
  2. Step 2: Convert to fraction form
    20,613.52/28,438.54 = 12,641.90/x
  3. Step 3: Cross multiply
    20,613.52x = 28,438.54 × 12,641.90
  4. Step 4: Simplify right side
    20,613.52x = 359,517,178.83
  5. Step 5: Solve for x
    x = 359,517,178.83/20,613.52
  6. Step 6: Final answer
    x = 17,440.84

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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.