Home / 20,840.35-31,251.07-8,988.52

Finding the Fourth Proportional to 20,840.35, 31,251.07 and 8,988.52

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Solution

The fourth proportional to 20,840.35, 31,251.07 and 8,988.52 is: 13,478.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.35 : 31,251.07 = 8,988.52 : x
  2. Step 2: Convert to fraction form
    20,840.35/31,251.07 = 8,988.52/x
  3. Step 3: Cross multiply
    20,840.35x = 31,251.07 × 8,988.52
  4. Step 4: Simplify right side
    20,840.35x = 280,900,808.86
  5. Step 5: Solve for x
    x = 280,900,808.86/20,840.35
  6. Step 6: Final answer
    x = 13,478.70

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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.