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Finding the Fourth Proportional to 47,375.80, 65,379.90 and 28,519

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Solution

The fourth proportional to 47,375.80, 65,379.90 and 28,519 is: 39,357.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,375.80 : 65,379.90 = 28,519 : x
  2. Step 2: Convert to fraction form
    47,375.80/65,379.90 = 28,519/x
  3. Step 3: Cross multiply
    47,375.80x = 65,379.90 × 28,519
  4. Step 4: Simplify right side
    47,375.80x = 1,864,569,368.10
  5. Step 5: Solve for x
    x = 1,864,569,368.10/47,375.80
  6. Step 6: Final answer
    x = 39,357.00

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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.