Home / 7,987.40-11,965.18-6,247.88

Finding the Fourth Proportional to 7,987.40, 11,965.18 and 6,247.88

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Solution

The fourth proportional to 7,987.40, 11,965.18 and 6,247.88 is: 9,359.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.40 : 11,965.18 = 6,247.88 : x
  2. Step 2: Convert to fraction form
    7,987.40/11,965.18 = 6,247.88/x
  3. Step 3: Cross multiply
    7,987.40x = 11,965.18 × 6,247.88
  4. Step 4: Simplify right side
    7,987.40x = 74,757,008.82
  5. Step 5: Solve for x
    x = 74,757,008.82/7,987.40
  6. Step 6: Final answer
    x = 9,359.37

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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.