Home / 20,949.36-31,419.18-9,863.70

Finding the Fourth Proportional to 20,949.36, 31,419.18 and 9,863.70

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Solution

The fourth proportional to 20,949.36, 31,419.18 and 9,863.70 is: 14,793.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.36 : 31,419.18 = 9,863.70 : x
  2. Step 2: Convert to fraction form
    20,949.36/31,419.18 = 9,863.70/x
  3. Step 3: Cross multiply
    20,949.36x = 31,419.18 × 9,863.70
  4. Step 4: Simplify right side
    20,949.36x = 309,909,365.77
  5. Step 5: Solve for x
    x = 309,909,365.77/20,949.36
  6. Step 6: Final answer
    x = 14,793.26

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1.5x scale

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.