Home / 28,418.05-42,617.85-13,422.85

Finding the Fourth Proportional to 28,418.05, 42,617.85 and 13,422.85

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Solution

The fourth proportional to 28,418.05, 42,617.85 and 13,422.85 is: 20,129.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,418.05 : 42,617.85 = 13,422.85 : x
  2. Step 2: Convert to fraction form
    28,418.05/42,617.85 = 13,422.85/x
  3. Step 3: Cross multiply
    28,418.05x = 42,617.85 × 13,422.85
  4. Step 4: Simplify right side
    28,418.05x = 572,053,007.87
  5. Step 5: Solve for x
    x = 572,053,007.87/28,418.05
  6. Step 6: Final answer
    x = 20,129.92

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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.