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Finding the Fourth Proportional to 56,338.80, 84,449.16 and 18,889.68

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Solution

The fourth proportional to 56,338.80, 84,449.16 and 18,889.68 is: 28,314.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,338.80 : 84,449.16 = 18,889.68 : x
  2. Step 2: Convert to fraction form
    56,338.80/84,449.16 = 18,889.68/x
  3. Step 3: Cross multiply
    56,338.80x = 84,449.16 × 18,889.68
  4. Step 4: Simplify right side
    56,338.80x = 1,595,217,608.67
  5. Step 5: Solve for x
    x = 1,595,217,608.67/56,338.80
  6. Step 6: Final answer
    x = 28,314.72

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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.