Home / 20,874.78-31,290.30-9,772.52

Finding the Fourth Proportional to 20,874.78, 31,290.30 and 9,772.52

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Solution

The fourth proportional to 20,874.78, 31,290.30 and 9,772.52 is: 14,648.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.78 : 31,290.30 = 9,772.52 : x
  2. Step 2: Convert to fraction form
    20,874.78/31,290.30 = 9,772.52/x
  3. Step 3: Cross multiply
    20,874.78x = 31,290.30 × 9,772.52
  4. Step 4: Simplify right side
    20,874.78x = 305,784,926.10
  5. Step 5: Solve for x
    x = 305,784,926.10/20,874.78
  6. Step 6: Final answer
    x = 14,648.53

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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.