Home / 20,995.68-28,974.11-11,435.64

Finding the Fourth Proportional to 20,995.68, 28,974.11 and 11,435.64

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Solution

The fourth proportional to 20,995.68, 28,974.11 and 11,435.64 is: 15,781.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.68 : 28,974.11 = 11,435.64 : x
  2. Step 2: Convert to fraction form
    20,995.68/28,974.11 = 11,435.64/x
  3. Step 3: Cross multiply
    20,995.68x = 28,974.11 × 11,435.64
  4. Step 4: Simplify right side
    20,995.68x = 331,337,434.10
  5. Step 5: Solve for x
    x = 331,337,434.10/20,995.68
  6. Step 6: Final answer
    x = 15,781.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.