Home / 13,375.57-18,456.48-7,407.09

Finding the Fourth Proportional to 13,375.57, 18,456.48 and 7,407.09

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Solution

The fourth proportional to 13,375.57, 18,456.48 and 7,407.09 is: 10,220.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,375.57 : 18,456.48 = 7,407.09 : x
  2. Step 2: Convert to fraction form
    13,375.57/18,456.48 = 7,407.09/x
  3. Step 3: Cross multiply
    13,375.57x = 18,456.48 × 7,407.09
  4. Step 4: Simplify right side
    13,375.57x = 136,708,808.44
  5. Step 5: Solve for x
    x = 136,708,808.44/13,375.57
  6. Step 6: Final answer
    x = 10,220.78

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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.