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Finding the Fourth Proportional to 20,808.08, 28,713.12 and 11,854.88

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Solution

The fourth proportional to 20,808.08, 28,713.12 and 11,854.88 is: 16,358.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.08 : 28,713.12 = 11,854.88 : x
  2. Step 2: Convert to fraction form
    20,808.08/28,713.12 = 11,854.88/x
  3. Step 3: Cross multiply
    20,808.08x = 28,713.12 × 11,854.88
  4. Step 4: Simplify right side
    20,808.08x = 340,390,592.03
  5. Step 5: Solve for x
    x = 340,390,592.03/20,808.08
  6. Step 6: Final answer
    x = 16,358.58

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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.