Home / 20,989.28-31,479.60-9,295.04

Finding the Fourth Proportional to 20,989.28, 31,479.60 and 9,295.04

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Solution

The fourth proportional to 20,989.28, 31,479.60 and 9,295.04 is: 13,940.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.28 : 31,479.60 = 9,295.04 : x
  2. Step 2: Convert to fraction form
    20,989.28/31,479.60 = 9,295.04/x
  3. Step 3: Cross multiply
    20,989.28x = 31,479.60 × 9,295.04
  4. Step 4: Simplify right side
    20,989.28x = 292,604,141.18
  5. Step 5: Solve for x
    x = 292,604,141.18/20,989.28
  6. Step 6: Final answer
    x = 13,940.65

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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.