Home / 25,825.80-35,640.09-15,221.28

Finding the Fourth Proportional to 25,825.80, 35,640.09 and 15,221.28

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Solution

The fourth proportional to 25,825.80, 35,640.09 and 15,221.28 is: 21,005.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,825.80 : 35,640.09 = 15,221.28 : x
  2. Step 2: Convert to fraction form
    25,825.80/35,640.09 = 15,221.28/x
  3. Step 3: Cross multiply
    25,825.80x = 35,640.09 × 15,221.28
  4. Step 4: Simplify right side
    25,825.80x = 542,487,789.12
  5. Step 5: Solve for x
    x = 542,487,789.12/25,825.80
  6. Step 6: Final answer
    x = 21,005.65

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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.