Home / 20,964.47-31,440.30-5,972.81

Finding the Fourth Proportional to 20,964.47, 31,440.30 and 5,972.81

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Solution

The fourth proportional to 20,964.47, 31,440.30 and 5,972.81 is: 8,957.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.47 : 31,440.30 = 5,972.81 : x
  2. Step 2: Convert to fraction form
    20,964.47/31,440.30 = 5,972.81/x
  3. Step 3: Cross multiply
    20,964.47x = 31,440.30 × 5,972.81
  4. Step 4: Simplify right side
    20,964.47x = 187,787,016.10
  5. Step 5: Solve for x
    x = 187,787,016.10/20,964.47
  6. Step 6: Final answer
    x = 8,957.39

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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.