Home / 20,335.85-28,043.76-15,857.97

Finding the Fourth Proportional to 20,335.85, 28,043.76 and 15,857.97

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Solution

The fourth proportional to 20,335.85, 28,043.76 and 15,857.97 is: 21,868.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.85 : 28,043.76 = 15,857.97 : x
  2. Step 2: Convert to fraction form
    20,335.85/28,043.76 = 15,857.97/x
  3. Step 3: Cross multiply
    20,335.85x = 28,043.76 × 15,857.97
  4. Step 4: Simplify right side
    20,335.85x = 444,717,104.77
  5. Step 5: Solve for x
    x = 444,717,104.77/20,335.85
  6. Step 6: Final answer
    x = 21,868.62

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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.