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Finding the Fourth Proportional to 18,998.46, 28,454.88 and 9,145.14

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Solution

The fourth proportional to 18,998.46, 28,454.88 and 9,145.14 is: 13,697.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.46 : 28,454.88 = 9,145.14 : x
  2. Step 2: Convert to fraction form
    18,998.46/28,454.88 = 9,145.14/x
  3. Step 3: Cross multiply
    18,998.46x = 28,454.88 × 9,145.14
  4. Step 4: Simplify right side
    18,998.46x = 260,223,861.28
  5. Step 5: Solve for x
    x = 260,223,861.28/18,998.46
  6. Step 6: Final answer
    x = 13,697.10

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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.