Home / 13,957.28-20,929.30-5,412.72

Finding the Fourth Proportional to 13,957.28, 20,929.30 and 5,412.72

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Solution

The fourth proportional to 13,957.28, 20,929.30 and 5,412.72 is: 8,116.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,957.28 : 20,929.30 = 5,412.72 : x
  2. Step 2: Convert to fraction form
    13,957.28/20,929.30 = 5,412.72/x
  3. Step 3: Cross multiply
    13,957.28x = 20,929.30 × 5,412.72
  4. Step 4: Simplify right side
    13,957.28x = 113,284,440.70
  5. Step 5: Solve for x
    x = 113,284,440.70/13,957.28
  6. Step 6: Final answer
    x = 8,116.51

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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.