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Finding the Fourth Proportional to 20,557.60, 30,810.84 and 10,691.08

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Solution

The fourth proportional to 20,557.60, 30,810.84 and 10,691.08 is: 16,023.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.60 : 30,810.84 = 10,691.08 : x
  2. Step 2: Convert to fraction form
    20,557.60/30,810.84 = 10,691.08/x
  3. Step 3: Cross multiply
    20,557.60x = 30,810.84 × 10,691.08
  4. Step 4: Simplify right side
    20,557.60x = 329,401,155.31
  5. Step 5: Solve for x
    x = 329,401,155.31/20,557.60
  6. Step 6: Final answer
    x = 16,023.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.