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Finding the Fourth Proportional to 12,490.88, 17,232 and 7,520

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Solution

The fourth proportional to 12,490.88, 17,232 and 7,520 is: 10,374.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.88 : 17,232 = 7,520 : x
  2. Step 2: Convert to fraction form
    12,490.88/17,232 = 7,520/x
  3. Step 3: Cross multiply
    12,490.88x = 17,232 × 7,520
  4. Step 4: Simplify right side
    12,490.88x = 129,584,640
  5. Step 5: Solve for x
    x = 129,584,640/12,490.88
  6. Step 6: Final answer
    x = 10,374.34

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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.