Home / 12,920.26-19,460.20-12,298.18

Finding the Fourth Proportional to 12,920.26, 19,460.20 and 12,298.18

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Solution

The fourth proportional to 12,920.26, 19,460.20 and 12,298.18 is: 18,523.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.26 : 19,460.20 = 12,298.18 : x
  2. Step 2: Convert to fraction form
    12,920.26/19,460.20 = 12,298.18/x
  3. Step 3: Cross multiply
    12,920.26x = 19,460.20 × 12,298.18
  4. Step 4: Simplify right side
    12,920.26x = 239,325,042.44
  5. Step 5: Solve for x
    x = 239,325,042.44/12,920.26
  6. Step 6: Final answer
    x = 18,523.24

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Half scale
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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 (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.