Home / 28,878.52-39,851.24-18,129.20

Finding the Fourth Proportional to 28,878.52, 39,851.24 and 18,129.20

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Solution

The fourth proportional to 28,878.52, 39,851.24 and 18,129.20 is: 25,017.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,878.52 : 39,851.24 = 18,129.20 : x
  2. Step 2: Convert to fraction form
    28,878.52/39,851.24 = 18,129.20/x
  3. Step 3: Cross multiply
    28,878.52x = 39,851.24 × 18,129.20
  4. Step 4: Simplify right side
    28,878.52x = 722,471,100.21
  5. Step 5: Solve for x
    x = 722,471,100.21/28,878.52
  6. Step 6: Final answer
    x = 25,017.59

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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.