Home / 22,790.38-31,452.30-12,720.78

Finding the Fourth Proportional to 22,790.38, 31,452.30 and 12,720.78

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Solution

The fourth proportional to 22,790.38, 31,452.30 and 12,720.78 is: 17,555.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,790.38 : 31,452.30 = 12,720.78 : x
  2. Step 2: Convert to fraction form
    22,790.38/31,452.30 = 12,720.78/x
  3. Step 3: Cross multiply
    22,790.38x = 31,452.30 × 12,720.78
  4. Step 4: Simplify right side
    22,790.38x = 400,097,567.93
  5. Step 5: Solve for x
    x = 400,097,567.93/22,790.38
  6. Step 6: Final answer
    x = 17,555.55

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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.