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Finding the Fourth Proportional to 7,892.95, 11,839.43 and 3,215.51

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Solution

The fourth proportional to 7,892.95, 11,839.43 and 3,215.51 is: 4,823.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,892.95 : 11,839.43 = 3,215.51 : x
  2. Step 2: Convert to fraction form
    7,892.95/11,839.43 = 3,215.51/x
  3. Step 3: Cross multiply
    7,892.95x = 11,839.43 × 3,215.51
  4. Step 4: Simplify right side
    7,892.95x = 38,069,805.56
  5. Step 5: Solve for x
    x = 38,069,805.56/7,892.95
  6. Step 6: Final answer
    x = 4,823.27

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Similar ratio
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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.