Home / 12,820.23-17,691.66-7,231.23

Finding the Fourth Proportional to 12,820.23, 17,691.66 and 7,231.23

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Solution

The fourth proportional to 12,820.23, 17,691.66 and 7,231.23 is: 9,978.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,820.23 : 17,691.66 = 7,231.23 : x
  2. Step 2: Convert to fraction form
    12,820.23/17,691.66 = 7,231.23/x
  3. Step 3: Cross multiply
    12,820.23x = 17,691.66 × 7,231.23
  4. Step 4: Simplify right side
    12,820.23x = 127,932,462.54
  5. Step 5: Solve for x
    x = 127,932,462.54/12,820.23
  6. Step 6: Final answer
    x = 9,978.95

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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.