Home / 28,086.92-38,760.18-15,511.88

Finding the Fourth Proportional to 28,086.92, 38,760.18 and 15,511.88

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Solution

The fourth proportional to 28,086.92, 38,760.18 and 15,511.88 is: 21,406.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,086.92 : 38,760.18 = 15,511.88 : x
  2. Step 2: Convert to fraction form
    28,086.92/38,760.18 = 15,511.88/x
  3. Step 3: Cross multiply
    28,086.92x = 38,760.18 × 15,511.88
  4. Step 4: Simplify right side
    28,086.92x = 601,243,260.94
  5. Step 5: Solve for x
    x = 601,243,260.94/28,086.92
  6. Step 6: Final answer
    x = 21,406.52

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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.