Home / 12,486.62-17,231.10-6,821.18

Finding the Fourth Proportional to 12,486.62, 17,231.10 and 6,821.18

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Solution

The fourth proportional to 12,486.62, 17,231.10 and 6,821.18 is: 9,412.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.62 : 17,231.10 = 6,821.18 : x
  2. Step 2: Convert to fraction form
    12,486.62/17,231.10 = 6,821.18/x
  3. Step 3: Cross multiply
    12,486.62x = 17,231.10 × 6,821.18
  4. Step 4: Simplify right side
    12,486.62x = 117,536,434.70
  5. Step 5: Solve for x
    x = 117,536,434.70/12,486.62
  6. Step 6: Final answer
    x = 9,412.99

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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.