Home / 15,720.72-23,581.77-5,191.66

Finding the Fourth Proportional to 15,720.72, 23,581.77 and 5,191.66

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Solution

The fourth proportional to 15,720.72, 23,581.77 and 5,191.66 is: 7,787.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.72 : 23,581.77 = 5,191.66 : x
  2. Step 2: Convert to fraction form
    15,720.72/23,581.77 = 5,191.66/x
  3. Step 3: Cross multiply
    15,720.72x = 23,581.77 × 5,191.66
  4. Step 4: Simplify right side
    15,720.72x = 122,428,542.05
  5. Step 5: Solve for x
    x = 122,428,542.05/15,720.72
  6. Step 6: Final answer
    x = 7,787.72

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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.