Home / 28,179.72-38,889.24-15,604.47

Finding the Fourth Proportional to 28,179.72, 38,889.24 and 15,604.47

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Solution

The fourth proportional to 28,179.72, 38,889.24 and 15,604.47 is: 21,534.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,179.72 : 38,889.24 = 15,604.47 : x
  2. Step 2: Convert to fraction form
    28,179.72/38,889.24 = 15,604.47/x
  3. Step 3: Cross multiply
    28,179.72x = 38,889.24 × 15,604.47
  4. Step 4: Simplify right side
    28,179.72x = 606,845,978.90
  5. Step 5: Solve for x
    x = 606,845,978.90/28,179.72
  6. Step 6: Final answer
    x = 21,534.85

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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.