Home / 28,530.28-42,813.78-15,391.72

Finding the Fourth Proportional to 28,530.28, 42,813.78 and 15,391.72

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Solution

The fourth proportional to 28,530.28, 42,813.78 and 15,391.72 is: 23,097.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,530.28 : 42,813.78 = 15,391.72 : x
  2. Step 2: Convert to fraction form
    28,530.28/42,813.78 = 15,391.72/x
  3. Step 3: Cross multiply
    28,530.28x = 42,813.78 × 15,391.72
  4. Step 4: Simplify right side
    28,530.28x = 658,977,713.90
  5. Step 5: Solve for x
    x = 658,977,713.90/28,530.28
  6. Step 6: Final answer
    x = 23,097.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.