Home / 28,087.92-38,761.56-15,512.88

Finding the Fourth Proportional to 28,087.92, 38,761.56 and 15,512.88

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Solution

The fourth proportional to 28,087.92, 38,761.56 and 15,512.88 is: 21,407.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,087.92 : 38,761.56 = 15,512.88 : x
  2. Step 2: Convert to fraction form
    28,087.92/38,761.56 = 15,512.88/x
  3. Step 3: Cross multiply
    28,087.92x = 38,761.56 × 15,512.88
  4. Step 4: Simplify right side
    28,087.92x = 601,303,428.89
  5. Step 5: Solve for x
    x = 601,303,428.89/28,087.92
  6. Step 6: Final answer
    x = 21,407.90

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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.