Home / 20,630.59-28,468.72-11,679.10

Finding the Fourth Proportional to 20,630.59, 28,468.72 and 11,679.10

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Solution

The fourth proportional to 20,630.59, 28,468.72 and 11,679.10 is: 16,116.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.59 : 28,468.72 = 11,679.10 : x
  2. Step 2: Convert to fraction form
    20,630.59/28,468.72 = 11,679.10/x
  3. Step 3: Cross multiply
    20,630.59x = 28,468.72 × 11,679.10
  4. Step 4: Simplify right side
    20,630.59x = 332,489,027.75
  5. Step 5: Solve for x
    x = 332,489,027.75/20,630.59
  6. Step 6: Final answer
    x = 16,116.31

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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.