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Finding the Fourth Proportional to 8,589.72, 12,943.08 and 7,063.90

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Solution

The fourth proportional to 8,589.72, 12,943.08 and 7,063.90 is: 10,643.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,589.72 : 12,943.08 = 7,063.90 : x
  2. Step 2: Convert to fraction form
    8,589.72/12,943.08 = 7,063.90/x
  3. Step 3: Cross multiply
    8,589.72x = 12,943.08 × 7,063.90
  4. Step 4: Simplify right side
    8,589.72x = 91,428,622.81
  5. Step 5: Solve for x
    x = 91,428,622.81/8,589.72
  6. Step 6: Final answer
    x = 10,643.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.