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Finding the Fourth Proportional to 7,287.78, 10,931.05 and 4,363.95

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Solution

The fourth proportional to 7,287.78, 10,931.05 and 4,363.95 is: 6,545.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,287.78 : 10,931.05 = 4,363.95 : x
  2. Step 2: Convert to fraction form
    7,287.78/10,931.05 = 4,363.95/x
  3. Step 3: Cross multiply
    7,287.78x = 10,931.05 × 4,363.95
  4. Step 4: Simplify right side
    7,287.78x = 47,702,555.65
  5. Step 5: Solve for x
    x = 47,702,555.65/7,287.78
  6. Step 6: Final answer
    x = 6,545.55

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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.