Home / 11,487.80-17,240.34-7,781.24

Finding the Fourth Proportional to 11,487.80, 17,240.34 and 7,781.24

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Solution

The fourth proportional to 11,487.80, 17,240.34 and 7,781.24 is: 11,677.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,487.80 : 17,240.34 = 7,781.24 : x
  2. Step 2: Convert to fraction form
    11,487.80/17,240.34 = 7,781.24/x
  3. Step 3: Cross multiply
    11,487.80x = 17,240.34 × 7,781.24
  4. Step 4: Simplify right side
    11,487.80x = 134,151,223.22
  5. Step 5: Solve for x
    x = 134,151,223.22/11,487.80
  6. Step 6: Final answer
    x = 11,677.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.