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Finding the Fourth Proportional to 34,687.30, 52,043.97 and 20,655.40

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Solution

The fourth proportional to 34,687.30, 52,043.97 and 20,655.40 is: 30,990.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,687.30 : 52,043.97 = 20,655.40 : x
  2. Step 2: Convert to fraction form
    34,687.30/52,043.97 = 20,655.40/x
  3. Step 3: Cross multiply
    34,687.30x = 52,043.97 × 20,655.40
  4. Step 4: Simplify right side
    34,687.30x = 1,074,989,017.94
  5. Step 5: Solve for x
    x = 1,074,989,017.94/34,687.30
  6. Step 6: Final answer
    x = 30,990.85

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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.