Home / 13,608.18-20,397.51-5,285.70

Finding the Fourth Proportional to 13,608.18, 20,397.51 and 5,285.70

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Solution

The fourth proportional to 13,608.18, 20,397.51 and 5,285.70 is: 7,922.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.18 : 20,397.51 = 5,285.70 : x
  2. Step 2: Convert to fraction form
    13,608.18/20,397.51 = 5,285.70/x
  3. Step 3: Cross multiply
    13,608.18x = 20,397.51 × 5,285.70
  4. Step 4: Simplify right side
    13,608.18x = 107,815,118.61
  5. Step 5: Solve for x
    x = 107,815,118.61/13,608.18
  6. Step 6: Final answer
    x = 7,922.82

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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.