Home / 12,845.62-17,719.32-8,121.70

Finding the Fourth Proportional to 12,845.62, 17,719.32 and 8,121.70

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Solution

The fourth proportional to 12,845.62, 17,719.32 and 8,121.70 is: 11,203.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,845.62 : 17,719.32 = 8,121.70 : x
  2. Step 2: Convert to fraction form
    12,845.62/17,719.32 = 8,121.70/x
  3. Step 3: Cross multiply
    12,845.62x = 17,719.32 × 8,121.70
  4. Step 4: Simplify right side
    12,845.62x = 143,911,001.24
  5. Step 5: Solve for x
    x = 143,911,001.24/12,845.62
  6. Step 6: Final answer
    x = 11,203.12

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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.