Home / 22,812.39-31,480.32-12,740.76

Finding the Fourth Proportional to 22,812.39, 31,480.32 and 12,740.76

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Solution

The fourth proportional to 22,812.39, 31,480.32 and 12,740.76 is: 17,581.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,812.39 : 31,480.32 = 12,740.76 : x
  2. Step 2: Convert to fraction form
    22,812.39/31,480.32 = 12,740.76/x
  3. Step 3: Cross multiply
    22,812.39x = 31,480.32 × 12,740.76
  4. Step 4: Simplify right side
    22,812.39x = 401,083,201.84
  5. Step 5: Solve for x
    x = 401,083,201.84/22,812.39
  6. Step 6: Final answer
    x = 17,581.81

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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.