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Finding the Fourth Proportional to 15,469.92, 21,332.16 and 10,989

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Solution

The fourth proportional to 15,469.92, 21,332.16 and 10,989 is: 15,153.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,469.92 : 21,332.16 = 10,989 : x
  2. Step 2: Convert to fraction form
    15,469.92/21,332.16 = 10,989/x
  3. Step 3: Cross multiply
    15,469.92x = 21,332.16 × 10,989
  4. Step 4: Simplify right side
    15,469.92x = 234,419,106.24
  5. Step 5: Solve for x
    x = 234,419,106.24/15,469.92
  6. Step 6: Final answer
    x = 15,153.22

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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.