Home / 15,720.38-21,693.32-8,645.44

Finding the Fourth Proportional to 15,720.38, 21,693.32 and 8,645.44

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Solution

The fourth proportional to 15,720.38, 21,693.32 and 8,645.44 is: 11,930.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.38 : 21,693.32 = 8,645.44 : x
  2. Step 2: Convert to fraction form
    15,720.38/21,693.32 = 8,645.44/x
  3. Step 3: Cross multiply
    15,720.38x = 21,693.32 × 8,645.44
  4. Step 4: Simplify right side
    15,720.38x = 187,548,296.46
  5. Step 5: Solve for x
    x = 187,548,296.46/15,720.38
  6. Step 6: Final answer
    x = 11,930.26

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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.