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Finding the Fourth Proportional to 8,642.03, 12,939.96 and 4,939.16

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Solution

The fourth proportional to 8,642.03, 12,939.96 and 4,939.16 is: 7,395.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.03 : 12,939.96 = 4,939.16 : x
  2. Step 2: Convert to fraction form
    8,642.03/12,939.96 = 4,939.16/x
  3. Step 3: Cross multiply
    8,642.03x = 12,939.96 × 4,939.16
  4. Step 4: Simplify right side
    8,642.03x = 63,912,532.83
  5. Step 5: Solve for x
    x = 63,912,532.83/8,642.03
  6. Step 6: Final answer
    x = 7,395.55

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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.