Home / 28,138.20-38,825.10-15,560.52

Finding the Fourth Proportional to 28,138.20, 38,825.10 and 15,560.52

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Solution

The fourth proportional to 28,138.20, 38,825.10 and 15,560.52 is: 21,470.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138.20 : 38,825.10 = 15,560.52 : x
  2. Step 2: Convert to fraction form
    28,138.20/38,825.10 = 15,560.52/x
  3. Step 3: Cross multiply
    28,138.20x = 38,825.10 × 15,560.52
  4. Step 4: Simplify right side
    28,138.20x = 604,138,745.05
  5. Step 5: Solve for x
    x = 604,138,745.05/28,138.20
  6. Step 6: Final answer
    x = 21,470.41

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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.