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Finding the Fourth Proportional to 18,955.62, 28,439.72 and 5,808.12

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Solution

The fourth proportional to 18,955.62, 28,439.72 and 5,808.12 is: 8,714.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955.62 : 28,439.72 = 5,808.12 : x
  2. Step 2: Convert to fraction form
    18,955.62/28,439.72 = 5,808.12/x
  3. Step 3: Cross multiply
    18,955.62x = 28,439.72 × 5,808.12
  4. Step 4: Simplify right side
    18,955.62x = 165,181,306.53
  5. Step 5: Solve for x
    x = 165,181,306.53/18,955.62
  6. Step 6: Final answer
    x = 8,714.11

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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.