Home / 20,949.60-31,434.64-9,857.39

Finding the Fourth Proportional to 20,949.60, 31,434.64 and 9,857.39

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Solution

The fourth proportional to 20,949.60, 31,434.64 and 9,857.39 is: 14,790.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.60 : 31,434.64 = 9,857.39 : x
  2. Step 2: Convert to fraction form
    20,949.60/31,434.64 = 9,857.39/x
  3. Step 3: Cross multiply
    20,949.60x = 31,434.64 × 9,857.39
  4. Step 4: Simplify right side
    20,949.60x = 309,863,505.99
  5. Step 5: Solve for x
    x = 309,863,505.99/20,949.60
  6. Step 6: Final answer
    x = 14,790.90

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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.