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Finding the Fourth Proportional to 18,706.70, 28,063.20 and 5,560.40

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Solution

The fourth proportional to 18,706.70, 28,063.20 and 5,560.40 is: 8,341.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.70 : 28,063.20 = 5,560.40 : x
  2. Step 2: Convert to fraction form
    18,706.70/28,063.20 = 5,560.40/x
  3. Step 3: Cross multiply
    18,706.70x = 28,063.20 × 5,560.40
  4. Step 4: Simplify right side
    18,706.70x = 156,042,617.28
  5. Step 5: Solve for x
    x = 156,042,617.28/18,706.70
  6. Step 6: Final answer
    x = 8,341.54

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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.