Home / 13,249.19-18,278.65-7,580.90

Finding the Fourth Proportional to 13,249.19, 18,278.65 and 7,580.90

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Solution

The fourth proportional to 13,249.19, 18,278.65 and 7,580.90 is: 10,458.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,249.19 : 18,278.65 = 7,580.90 : x
  2. Step 2: Convert to fraction form
    13,249.19/18,278.65 = 7,580.90/x
  3. Step 3: Cross multiply
    13,249.19x = 18,278.65 × 7,580.90
  4. Step 4: Simplify right side
    13,249.19x = 138,568,672.96
  5. Step 5: Solve for x
    x = 138,568,672.96/13,249.19
  6. Step 6: Final answer
    x = 10,458.65

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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.