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Finding the Fourth Proportional to 8,118.65, 12,154.25 and 7,340.45

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Solution

The fourth proportional to 8,118.65, 12,154.25 and 7,340.45 is: 10,989.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.65 : 12,154.25 = 7,340.45 : x
  2. Step 2: Convert to fraction form
    8,118.65/12,154.25 = 7,340.45/x
  3. Step 3: Cross multiply
    8,118.65x = 12,154.25 × 7,340.45
  4. Step 4: Simplify right side
    8,118.65x = 89,217,621.99
  5. Step 5: Solve for x
    x = 89,217,621.99/8,118.65
  6. Step 6: Final answer
    x = 10,989.22

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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.