Home / 21,332.75-31,985.44-8,861.39

Finding the Fourth Proportional to 21,332.75, 31,985.44 and 8,861.39

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Solution

The fourth proportional to 21,332.75, 31,985.44 and 8,861.39 is: 13,286.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,332.75 : 31,985.44 = 8,861.39 : x
  2. Step 2: Convert to fraction form
    21,332.75/31,985.44 = 8,861.39/x
  3. Step 3: Cross multiply
    21,332.75x = 31,985.44 × 8,861.39
  4. Step 4: Simplify right side
    21,332.75x = 283,435,276.08
  5. Step 5: Solve for x
    x = 283,435,276.08/21,332.75
  6. Step 6: Final answer
    x = 13,286.39

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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.