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Finding the Fourth Proportional to 47,687.62, 71,530.89 and 19,620.58

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Solution

The fourth proportional to 47,687.62, 71,530.89 and 19,620.58 is: 29,430.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,687.62 : 71,530.89 = 19,620.58 : x
  2. Step 2: Convert to fraction form
    47,687.62/71,530.89 = 19,620.58/x
  3. Step 3: Cross multiply
    47,687.62x = 71,530.89 × 19,620.58
  4. Step 4: Simplify right side
    47,687.62x = 1,403,477,549.72
  5. Step 5: Solve for x
    x = 1,403,477,549.72/47,687.62
  6. Step 6: Final answer
    x = 29,430.65

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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.