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Finding the Fourth Proportional to 56,399, 84,599.86 and 18,959.56

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Solution

The fourth proportional to 56,399, 84,599.86 and 18,959.56 is: 28,439.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,399 : 84,599.86 = 18,959.56 : x
  2. Step 2: Convert to fraction form
    56,399/84,599.86 = 18,959.56/x
  3. Step 3: Cross multiply
    56,399x = 84,599.86 × 18,959.56
  4. Step 4: Simplify right side
    56,399x = 1,603,976,121.66
  5. Step 5: Solve for x
    x = 1,603,976,121.66/56,399
  6. Step 6: Final answer
    x = 28,439.80

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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.