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Finding the Fourth Proportional to 18,872.30, 28,311.12 and 6,395.88

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Solution

The fourth proportional to 18,872.30, 28,311.12 and 6,395.88 is: 9,594.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,872.30 : 28,311.12 = 6,395.88 : x
  2. Step 2: Convert to fraction form
    18,872.30/28,311.12 = 6,395.88/x
  3. Step 3: Cross multiply
    18,872.30x = 28,311.12 × 6,395.88
  4. Step 4: Simplify right side
    18,872.30x = 181,074,526.19
  5. Step 5: Solve for x
    x = 181,074,526.19/18,872.30
  6. Step 6: Final answer
    x = 9,594.72

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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.