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Finding the Fourth Proportional to 8,985.97, 12,412.74 and 8,147.62

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Solution

The fourth proportional to 8,985.97, 12,412.74 and 8,147.62 is: 11,254.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.97 : 12,412.74 = 8,147.62 : x
  2. Step 2: Convert to fraction form
    8,985.97/12,412.74 = 8,147.62/x
  3. Step 3: Cross multiply
    8,985.97x = 12,412.74 × 8,147.62
  4. Step 4: Simplify right side
    8,985.97x = 101,134,288.68
  5. Step 5: Solve for x
    x = 101,134,288.68/8,985.97
  6. Step 6: Final answer
    x = 11,254.69

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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.