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Finding the Fourth Proportional to 48,642.89, 72,992.48 and 20,561.13

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Solution

The fourth proportional to 48,642.89, 72,992.48 and 20,561.13 is: 30,853.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,642.89 : 72,992.48 = 20,561.13 : x
  2. Step 2: Convert to fraction form
    48,642.89/72,992.48 = 20,561.13/x
  3. Step 3: Cross multiply
    48,642.89x = 72,992.48 × 20,561.13
  4. Step 4: Simplify right side
    48,642.89x = 1,500,807,767.50
  5. Step 5: Solve for x
    x = 1,500,807,767.50/48,642.89
  6. Step 6: Final answer
    x = 30,853.59

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1.5x scale

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.