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Finding the Fourth Proportional to 8,720.72, 12,034.68 and 4,943.90

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Solution

The fourth proportional to 8,720.72, 12,034.68 and 4,943.90 is: 6,822.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.72 : 12,034.68 = 4,943.90 : x
  2. Step 2: Convert to fraction form
    8,720.72/12,034.68 = 4,943.90/x
  3. Step 3: Cross multiply
    8,720.72x = 12,034.68 × 4,943.90
  4. Step 4: Simplify right side
    8,720.72x = 59,498,254.45
  5. Step 5: Solve for x
    x = 59,498,254.45/8,720.72
  6. Step 6: Final answer
    x = 6,822.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.