Home / 11,083.81-15,278.68-7,887.55

Finding the Fourth Proportional to 11,083.81, 15,278.68 and 7,887.55

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Solution

The fourth proportional to 11,083.81, 15,278.68 and 7,887.55 is: 10,872.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,083.81 : 15,278.68 = 7,887.55 : x
  2. Step 2: Convert to fraction form
    11,083.81/15,278.68 = 7,887.55/x
  3. Step 3: Cross multiply
    11,083.81x = 15,278.68 × 7,887.55
  4. Step 4: Simplify right side
    11,083.81x = 120,511,352.43
  5. Step 5: Solve for x
    x = 120,511,352.43/11,083.81
  6. Step 6: Final answer
    x = 10,872.74

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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.