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Finding the Fourth Proportional to 8,360.80, 12,541.40 and 3,978.70

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Solution

The fourth proportional to 8,360.80, 12,541.40 and 3,978.70 is: 5,968.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,360.80 : 12,541.40 = 3,978.70 : x
  2. Step 2: Convert to fraction form
    8,360.80/12,541.40 = 3,978.70/x
  3. Step 3: Cross multiply
    8,360.80x = 12,541.40 × 3,978.70
  4. Step 4: Simplify right side
    8,360.80x = 49,898,468.18
  5. Step 5: Solve for x
    x = 49,898,468.18/8,360.80
  6. Step 6: Final answer
    x = 5,968.15

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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.