Home / 20,865.61-28,794.54-11,433.97

Finding the Fourth Proportional to 20,865.61, 28,794.54 and 11,433.97

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Solution

The fourth proportional to 20,865.61, 28,794.54 and 11,433.97 is: 15,778.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.61 : 28,794.54 = 11,433.97 : x
  2. Step 2: Convert to fraction form
    20,865.61/28,794.54 = 11,433.97/x
  3. Step 3: Cross multiply
    20,865.61x = 28,794.54 × 11,433.97
  4. Step 4: Simplify right side
    20,865.61x = 329,235,985.39
  5. Step 5: Solve for x
    x = 329,235,985.39/20,865.61
  6. Step 6: Final answer
    x = 15,778.88

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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.