Home / 11,249.89-15,531.47-7,718.29

Finding the Fourth Proportional to 11,249.89, 15,531.47 and 7,718.29

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Solution

The fourth proportional to 11,249.89, 15,531.47 and 7,718.29 is: 10,655.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,249.89 : 15,531.47 = 7,718.29 : x
  2. Step 2: Convert to fraction form
    11,249.89/15,531.47 = 7,718.29/x
  3. Step 3: Cross multiply
    11,249.89x = 15,531.47 × 7,718.29
  4. Step 4: Simplify right side
    11,249.89x = 119,876,389.59
  5. Step 5: Solve for x
    x = 119,876,389.59/11,249.89
  6. Step 6: Final answer
    x = 10,655.78

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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.