Home / 15,443.76-21,311.28-8,729.68

Finding the Fourth Proportional to 15,443.76, 21,311.28 and 8,729.68

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Solution

The fourth proportional to 15,443.76, 21,311.28 and 8,729.68 is: 12,046.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,443.76 : 21,311.28 = 8,729.68 : x
  2. Step 2: Convert to fraction form
    15,443.76/21,311.28 = 8,729.68/x
  3. Step 3: Cross multiply
    15,443.76x = 21,311.28 × 8,729.68
  4. Step 4: Simplify right side
    15,443.76x = 186,040,654.79
  5. Step 5: Solve for x
    x = 186,040,654.79/15,443.76
  6. Step 6: Final answer
    x = 12,046.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.