Home / 20,462.91-28,242.70-12,809.75

Finding the Fourth Proportional to 20,462.91, 28,242.70 and 12,809.75

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Solution

The fourth proportional to 20,462.91, 28,242.70 and 12,809.75 is: 17,679.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,462.91 : 28,242.70 = 12,809.75 : x
  2. Step 2: Convert to fraction form
    20,462.91/28,242.70 = 12,809.75/x
  3. Step 3: Cross multiply
    20,462.91x = 28,242.70 × 12,809.75
  4. Step 4: Simplify right side
    20,462.91x = 361,781,911.95
  5. Step 5: Solve for x
    x = 361,781,911.95/20,462.91
  6. Step 6: Final answer
    x = 17,679.88

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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.