Home / 12,412.25-17,143.53-8,213.21

Finding the Fourth Proportional to 12,412.25, 17,143.53 and 8,213.21

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Solution

The fourth proportional to 12,412.25, 17,143.53 and 8,213.21 is: 11,343.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,412.25 : 17,143.53 = 8,213.21 : x
  2. Step 2: Convert to fraction form
    12,412.25/17,143.53 = 8,213.21/x
  3. Step 3: Cross multiply
    12,412.25x = 17,143.53 × 8,213.21
  4. Step 4: Simplify right side
    12,412.25x = 140,803,412.03
  5. Step 5: Solve for x
    x = 140,803,412.03/12,412.25
  6. Step 6: Final answer
    x = 11,343.91

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Double scale
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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.