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Finding the Fourth Proportional to 13,808.68, 20,712.92 and 5,043.47

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Solution

The fourth proportional to 13,808.68, 20,712.92 and 5,043.47 is: 7,565.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.68 : 20,712.92 = 5,043.47 : x
  2. Step 2: Convert to fraction form
    13,808.68/20,712.92 = 5,043.47/x
  3. Step 3: Cross multiply
    13,808.68x = 20,712.92 × 5,043.47
  4. Step 4: Simplify right side
    13,808.68x = 104,464,861.85
  5. Step 5: Solve for x
    x = 104,464,861.85/13,808.68
  6. Step 6: Final answer
    x = 7,565.16

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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.