Home / 12,206.10-18,309.15-5,645.10

Finding the Fourth Proportional to 12,206.10, 18,309.15 and 5,645.10

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Solution

The fourth proportional to 12,206.10, 18,309.15 and 5,645.10 is: 8,467.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,206.10 : 18,309.15 = 5,645.10 : x
  2. Step 2: Convert to fraction form
    12,206.10/18,309.15 = 5,645.10/x
  3. Step 3: Cross multiply
    12,206.10x = 18,309.15 × 5,645.10
  4. Step 4: Simplify right side
    12,206.10x = 103,356,982.67
  5. Step 5: Solve for x
    x = 103,356,982.67/12,206.10
  6. Step 6: Final answer
    x = 8,467.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.