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Finding the Fourth Proportional to 8,368.70, 12,545.30 and 3,100.78

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Solution

The fourth proportional to 8,368.70, 12,545.30 and 3,100.78 is: 4,648.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,368.70 : 12,545.30 = 3,100.78 : x
  2. Step 2: Convert to fraction form
    8,368.70/12,545.30 = 3,100.78/x
  3. Step 3: Cross multiply
    8,368.70x = 12,545.30 × 3,100.78
  4. Step 4: Simplify right side
    8,368.70x = 38,900,191.72
  5. Step 5: Solve for x
    x = 38,900,191.72/8,368.70
  6. Step 6: Final answer
    x = 4,648.29

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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.