Home / 12,721.38-17,557.74-8,007.18

Finding the Fourth Proportional to 12,721.38, 17,557.74 and 8,007.18

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Solution

The fourth proportional to 12,721.38, 17,557.74 and 8,007.18 is: 11,051.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.38 : 17,557.74 = 8,007.18 : x
  2. Step 2: Convert to fraction form
    12,721.38/17,557.74 = 8,007.18/x
  3. Step 3: Cross multiply
    12,721.38x = 17,557.74 × 8,007.18
  4. Step 4: Simplify right side
    12,721.38x = 140,587,984.57
  5. Step 5: Solve for x
    x = 140,587,984.57/12,721.38
  6. Step 6: Final answer
    x = 11,051.32

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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.