Home / 13,680.72-20,530.29-5,359.70

Finding the Fourth Proportional to 13,680.72, 20,530.29 and 5,359.70

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Solution

The fourth proportional to 13,680.72, 20,530.29 and 5,359.70 is: 8,043.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.72 : 20,530.29 = 5,359.70 : x
  2. Step 2: Convert to fraction form
    13,680.72/20,530.29 = 5,359.70/x
  3. Step 3: Cross multiply
    13,680.72x = 20,530.29 × 5,359.70
  4. Step 4: Simplify right side
    13,680.72x = 110,036,092.66
  5. Step 5: Solve for x
    x = 110,036,092.66/13,680.72
  6. Step 6: Final answer
    x = 8,043.15

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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.