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Finding the Fourth Proportional to 12,807.66, 19,186.79 and 7,243.97

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Solution

The fourth proportional to 12,807.66, 19,186.79 and 7,243.97 is: 10,851.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,807.66 : 19,186.79 = 7,243.97 : x
  2. Step 2: Convert to fraction form
    12,807.66/19,186.79 = 7,243.97/x
  3. Step 3: Cross multiply
    12,807.66x = 19,186.79 × 7,243.97
  4. Step 4: Simplify right side
    12,807.66x = 138,988,542.90
  5. Step 5: Solve for x
    x = 138,988,542.90/12,807.66
  6. Step 6: Final answer
    x = 10,851.99

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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.