Home / 8,378.66-11,548.30-7,174.90

Finding the Fourth Proportional to 8,378.66, 11,548.30 and 7,174.90

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Solution

The fourth proportional to 8,378.66, 11,548.30 and 7,174.90 is: 9,889.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378.66 : 11,548.30 = 7,174.90 : x
  2. Step 2: Convert to fraction form
    8,378.66/11,548.30 = 7,174.90/x
  3. Step 3: Cross multiply
    8,378.66x = 11,548.30 × 7,174.90
  4. Step 4: Simplify right side
    8,378.66x = 82,857,897.67
  5. Step 5: Solve for x
    x = 82,857,897.67/8,378.66
  6. Step 6: Final answer
    x = 9,889.16

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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.