Home / 20,320.32-30,481.02-9,788.70

Finding the Fourth Proportional to 20,320.32, 30,481.02 and 9,788.70

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Solution

The fourth proportional to 20,320.32, 30,481.02 and 9,788.70 is: 14,683.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.32 : 30,481.02 = 9,788.70 : x
  2. Step 2: Convert to fraction form
    20,320.32/30,481.02 = 9,788.70/x
  3. Step 3: Cross multiply
    20,320.32x = 30,481.02 × 9,788.70
  4. Step 4: Simplify right side
    20,320.32x = 298,369,560.47
  5. Step 5: Solve for x
    x = 298,369,560.47/20,320.32
  6. Step 6: Final answer
    x = 14,683.31

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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.