Home / 12,850.12-17,728.74-7,812.76

Finding the Fourth Proportional to 12,850.12, 17,728.74 and 7,812.76

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Solution

The fourth proportional to 12,850.12, 17,728.74 and 7,812.76 is: 10,778.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,850.12 : 17,728.74 = 7,812.76 : x
  2. Step 2: Convert to fraction form
    12,850.12/17,728.74 = 7,812.76/x
  3. Step 3: Cross multiply
    12,850.12x = 17,728.74 × 7,812.76
  4. Step 4: Simplify right side
    12,850.12x = 138,510,390.72
  5. Step 5: Solve for x
    x = 138,510,390.72/12,850.12
  6. Step 6: Final answer
    x = 10,778.92

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Half scale
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Double scale
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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.