Home / 28,155.11-38,855.27-15,579.86

Finding the Fourth Proportional to 28,155.11, 38,855.27 and 15,579.86

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Solution

The fourth proportional to 28,155.11, 38,855.27 and 15,579.86 is: 21,500.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,155.11 : 38,855.27 = 15,579.86 : x
  2. Step 2: Convert to fraction form
    28,155.11/38,855.27 = 15,579.86/x
  3. Step 3: Cross multiply
    28,155.11x = 38,855.27 × 15,579.86
  4. Step 4: Simplify right side
    28,155.11x = 605,359,511.54
  5. Step 5: Solve for x
    x = 605,359,511.54/28,155.11
  6. Step 6: Final answer
    x = 21,500.88

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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.