Home / 20,635.97-28,478.33-11,561.72

Finding the Fourth Proportional to 20,635.97, 28,478.33 and 11,561.72

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Solution

The fourth proportional to 20,635.97, 28,478.33 and 11,561.72 is: 15,955.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.97 : 28,478.33 = 11,561.72 : x
  2. Step 2: Convert to fraction form
    20,635.97/28,478.33 = 11,561.72/x
  3. Step 3: Cross multiply
    20,635.97x = 28,478.33 × 11,561.72
  4. Step 4: Simplify right side
    20,635.97x = 329,258,477.53
  5. Step 5: Solve for x
    x = 329,258,477.53/20,635.97
  6. Step 6: Final answer
    x = 15,955.56

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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.