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Finding the Fourth Proportional to 15,232.90, 21,020.40 and 8,518

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Solution

The fourth proportional to 15,232.90, 21,020.40 and 8,518 is: 11,754.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,232.90 : 21,020.40 = 8,518 : x
  2. Step 2: Convert to fraction form
    15,232.90/21,020.40 = 8,518/x
  3. Step 3: Cross multiply
    15,232.90x = 21,020.40 × 8,518
  4. Step 4: Simplify right side
    15,232.90x = 179,051,767.20
  5. Step 5: Solve for x
    x = 179,051,767.20/15,232.90
  6. Step 6: Final answer
    x = 11,754.28

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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.