Home / 28,800.76-39,729.88-19,832.72

Finding the Fourth Proportional to 28,800.76, 39,729.88 and 19,832.72

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Solution

The fourth proportional to 28,800.76, 39,729.88 and 19,832.72 is: 27,358.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,800.76 : 39,729.88 = 19,832.72 : x
  2. Step 2: Convert to fraction form
    28,800.76/39,729.88 = 19,832.72/x
  3. Step 3: Cross multiply
    28,800.76x = 39,729.88 × 19,832.72
  4. Step 4: Simplify right side
    28,800.76x = 787,951,585.67
  5. Step 5: Solve for x
    x = 787,951,585.67/28,800.76
  6. Step 6: Final answer
    x = 27,358.71

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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.