Home / 12,841.90-17,712.35-8,121.62

Finding the Fourth Proportional to 12,841.90, 17,712.35 and 8,121.62

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Solution

The fourth proportional to 12,841.90, 17,712.35 and 8,121.62 is: 11,201.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,841.90 : 17,712.35 = 8,121.62 : x
  2. Step 2: Convert to fraction form
    12,841.90/17,712.35 = 8,121.62/x
  3. Step 3: Cross multiply
    12,841.90x = 17,712.35 × 8,121.62
  4. Step 4: Simplify right side
    12,841.90x = 143,852,976.01
  5. Step 5: Solve for x
    x = 143,852,976.01/12,841.90
  6. Step 6: Final answer
    x = 11,201.85

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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.