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Finding the Fourth Proportional to 8,031.65, 11,086.74 and 7,190.87

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Solution

The fourth proportional to 8,031.65, 11,086.74 and 7,190.87 is: 9,926.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,031.65 : 11,086.74 = 7,190.87 : x
  2. Step 2: Convert to fraction form
    8,031.65/11,086.74 = 7,190.87/x
  3. Step 3: Cross multiply
    8,031.65x = 11,086.74 × 7,190.87
  4. Step 4: Simplify right side
    8,031.65x = 79,723,250.63
  5. Step 5: Solve for x
    x = 79,723,250.63/8,031.65
  6. Step 6: Final answer
    x = 9,926.14

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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.