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Finding the Fourth Proportional to 18,861, 28,251.12 and 9,948.18

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Solution

The fourth proportional to 18,861, 28,251.12 and 9,948.18 is: 14,900.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861 : 28,251.12 = 9,948.18 : x
  2. Step 2: Convert to fraction form
    18,861/28,251.12 = 9,948.18/x
  3. Step 3: Cross multiply
    18,861x = 28,251.12 × 9,948.18
  4. Step 4: Simplify right side
    18,861x = 281,047,226.96
  5. Step 5: Solve for x
    x = 281,047,226.96/18,861
  6. Step 6: Final answer
    x = 14,900.97

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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.