Home / 20,838.48-28,757.18-11,407.92

Finding the Fourth Proportional to 20,838.48, 28,757.18 and 11,407.92

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Solution

The fourth proportional to 20,838.48, 28,757.18 and 11,407.92 is: 15,742.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.48 : 28,757.18 = 11,407.92 : x
  2. Step 2: Convert to fraction form
    20,838.48/28,757.18 = 11,407.92/x
  3. Step 3: Cross multiply
    20,838.48x = 28,757.18 × 11,407.92
  4. Step 4: Simplify right side
    20,838.48x = 328,059,608.87
  5. Step 5: Solve for x
    x = 328,059,608.87/20,838.48
  6. Step 6: Final answer
    x = 15,742.97

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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.