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Finding the Fourth Proportional to 8,419.74, 12,640.77 and 7,195.02

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Solution

The fourth proportional to 8,419.74, 12,640.77 and 7,195.02 is: 10,802.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.74 : 12,640.77 = 7,195.02 : x
  2. Step 2: Convert to fraction form
    8,419.74/12,640.77 = 7,195.02/x
  3. Step 3: Cross multiply
    8,419.74x = 12,640.77 × 7,195.02
  4. Step 4: Simplify right side
    8,419.74x = 90,950,592.97
  5. Step 5: Solve for x
    x = 90,950,592.97/8,419.74
  6. Step 6: Final answer
    x = 10,802.07

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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.