Home / 28,972.80-43,446.40-13,395.20

Finding the Fourth Proportional to 28,972.80, 43,446.40 and 13,395.20

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Solution

The fourth proportional to 28,972.80, 43,446.40 and 13,395.20 is: 20,086.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,972.80 : 43,446.40 = 13,395.20 : x
  2. Step 2: Convert to fraction form
    28,972.80/43,446.40 = 13,395.20/x
  3. Step 3: Cross multiply
    28,972.80x = 43,446.40 × 13,395.20
  4. Step 4: Simplify right side
    28,972.80x = 581,973,217.28
  5. Step 5: Solve for x
    x = 581,973,217.28/28,972.80
  6. Step 6: Final answer
    x = 20,086.88

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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.