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Finding the Fourth Proportional to 8,419.65, 12,621.22 and 7,173.06

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Solution

The fourth proportional to 8,419.65, 12,621.22 and 7,173.06 is: 10,752.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.65 : 12,621.22 = 7,173.06 : x
  2. Step 2: Convert to fraction form
    8,419.65/12,621.22 = 7,173.06/x
  3. Step 3: Cross multiply
    8,419.65x = 12,621.22 × 7,173.06
  4. Step 4: Simplify right side
    8,419.65x = 90,532,732.47
  5. Step 5: Solve for x
    x = 90,532,732.47/8,419.65
  6. Step 6: Final answer
    x = 10,752.55

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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.