Home / 12,486.72-17,230.90-6,820.32

Finding the Fourth Proportional to 12,486.72, 17,230.90 and 6,820.32

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Solution

The fourth proportional to 12,486.72, 17,230.90 and 6,820.32 is: 9,411.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.72 : 17,230.90 = 6,820.32 : x
  2. Step 2: Convert to fraction form
    12,486.72/17,230.90 = 6,820.32/x
  3. Step 3: Cross multiply
    12,486.72x = 17,230.90 × 6,820.32
  4. Step 4: Simplify right side
    12,486.72x = 117,520,251.89
  5. Step 5: Solve for x
    x = 117,520,251.89/12,486.72
  6. Step 6: Final answer
    x = 9,411.62

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