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Finding the Fourth Proportional to 12,882.60, 19,326.60 and 7,331.40

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Solution

The fourth proportional to 12,882.60, 19,326.60 and 7,331.40 is: 10,998.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,882.60 : 19,326.60 = 7,331.40 : x
  2. Step 2: Convert to fraction form
    12,882.60/19,326.60 = 7,331.40/x
  3. Step 3: Cross multiply
    12,882.60x = 19,326.60 × 7,331.40
  4. Step 4: Simplify right side
    12,882.60x = 141,691,035.24
  5. Step 5: Solve for x
    x = 141,691,035.24/12,882.60
  6. Step 6: Final answer
    x = 10,998.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.