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Finding the Fourth Proportional to 12,428.31, 17,151.08 and 6,839.31

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Solution

The fourth proportional to 12,428.31, 17,151.08 and 6,839.31 is: 9,438.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.31 : 17,151.08 = 6,839.31 : x
  2. Step 2: Convert to fraction form
    12,428.31/17,151.08 = 6,839.31/x
  3. Step 3: Cross multiply
    12,428.31x = 17,151.08 × 6,839.31
  4. Step 4: Simplify right side
    12,428.31x = 117,301,552.95
  5. Step 5: Solve for x
    x = 117,301,552.95/12,428.31
  6. Step 6: Final answer
    x = 9,438.25

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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.