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Finding the Fourth Proportional to 21,144.60, 31,718.52 and 5,562

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Solution

The fourth proportional to 21,144.60, 31,718.52 and 5,562 is: 8,343.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.60 : 31,718.52 = 5,562 : x
  2. Step 2: Convert to fraction form
    21,144.60/31,718.52 = 5,562/x
  3. Step 3: Cross multiply
    21,144.60x = 31,718.52 × 5,562
  4. Step 4: Simplify right side
    21,144.60x = 176,418,408.24
  5. Step 5: Solve for x
    x = 176,418,408.24/21,144.60
  6. Step 6: Final answer
    x = 8,343.43

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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.