Home / 20,732.40-31,103.16-7,584.72

Finding the Fourth Proportional to 20,732.40, 31,103.16 and 7,584.72

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Solution

The fourth proportional to 20,732.40, 31,103.16 and 7,584.72 is: 11,378.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,732.40 : 31,103.16 = 7,584.72 : x
  2. Step 2: Convert to fraction form
    20,732.40/31,103.16 = 7,584.72/x
  3. Step 3: Cross multiply
    20,732.40x = 31,103.16 × 7,584.72
  4. Step 4: Simplify right side
    20,732.40x = 235,908,759.72
  5. Step 5: Solve for x
    x = 235,908,759.72/20,732.40
  6. Step 6: Final answer
    x = 11,378.75

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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.