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Finding the Fourth Proportional to 48,643.65, 72,993.60 and 20,561.88

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Solution

The fourth proportional to 48,643.65, 72,993.60 and 20,561.88 is: 30,854.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,643.65 : 72,993.60 = 20,561.88 : x
  2. Step 2: Convert to fraction form
    48,643.65/72,993.60 = 20,561.88/x
  3. Step 3: Cross multiply
    48,643.65x = 72,993.60 × 20,561.88
  4. Step 4: Simplify right side
    48,643.65x = 1,500,885,643.97
  5. Step 5: Solve for x
    x = 1,500,885,643.97/48,643.65
  6. Step 6: Final answer
    x = 30,854.71

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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.