Home / 20,992.41-28,970.84-11,560.97

Finding the Fourth Proportional to 20,992.41, 28,970.84 and 11,560.97

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Solution

The fourth proportional to 20,992.41, 28,970.84 and 11,560.97 is: 15,954.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.41 : 28,970.84 = 11,560.97 : x
  2. Step 2: Convert to fraction form
    20,992.41/28,970.84 = 11,560.97/x
  3. Step 3: Cross multiply
    20,992.41x = 28,970.84 × 11,560.97
  4. Step 4: Simplify right side
    20,992.41x = 334,930,809.46
  5. Step 5: Solve for x
    x = 334,930,809.46/20,992.41
  6. Step 6: Final answer
    x = 15,954.86

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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.