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Finding the Fourth Proportional to 18,874.14, 28,312.20 and 4,834.29

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Solution

The fourth proportional to 18,874.14, 28,312.20 and 4,834.29 is: 7,251.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,874.14 : 28,312.20 = 4,834.29 : x
  2. Step 2: Convert to fraction form
    18,874.14/28,312.20 = 4,834.29/x
  3. Step 3: Cross multiply
    18,874.14x = 28,312.20 × 4,834.29
  4. Step 4: Simplify right side
    18,874.14x = 136,869,385.34
  5. Step 5: Solve for x
    x = 136,869,385.34/18,874.14
  6. Step 6: Final answer
    x = 7,251.69

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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.