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Finding the Fourth Proportional to 13,803.68, 20,691.18 and 6,402.04

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Solution

The fourth proportional to 13,803.68, 20,691.18 and 6,402.04 is: 9,596.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,803.68 : 20,691.18 = 6,402.04 : x
  2. Step 2: Convert to fraction form
    13,803.68/20,691.18 = 6,402.04/x
  3. Step 3: Cross multiply
    13,803.68x = 20,691.18 × 6,402.04
  4. Step 4: Simplify right side
    13,803.68x = 132,465,710.28
  5. Step 5: Solve for x
    x = 132,465,710.28/13,803.68
  6. Step 6: Final answer
    x = 9,596.40

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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.