Home / 12,882.09-17,777.05-7,216.78

Finding the Fourth Proportional to 12,882.09, 17,777.05 and 7,216.78

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Solution

The fourth proportional to 12,882.09, 17,777.05 and 7,216.78 is: 9,959.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,882.09 : 17,777.05 = 7,216.78 : x
  2. Step 2: Convert to fraction form
    12,882.09/17,777.05 = 7,216.78/x
  3. Step 3: Cross multiply
    12,882.09x = 17,777.05 × 7,216.78
  4. Step 4: Simplify right side
    12,882.09x = 128,293,058.90
  5. Step 5: Solve for x
    x = 128,293,058.90/12,882.09
  6. Step 6: Final answer
    x = 9,959.03

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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.