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Finding the Fourth Proportional to 8,989.29, 13,478.85 and 3,721.32

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Solution

The fourth proportional to 8,989.29, 13,478.85 and 3,721.32 is: 5,579.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.29 : 13,478.85 = 3,721.32 : x
  2. Step 2: Convert to fraction form
    8,989.29/13,478.85 = 3,721.32/x
  3. Step 3: Cross multiply
    8,989.29x = 13,478.85 × 3,721.32
  4. Step 4: Simplify right side
    8,989.29x = 50,159,114.08
  5. Step 5: Solve for x
    x = 50,159,114.08/8,989.29
  6. Step 6: Final answer
    x = 5,579.87

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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.