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Finding the Fourth Proportional to 12,839.27, 17,718.01 and 7,174.13

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Solution

The fourth proportional to 12,839.27, 17,718.01 and 7,174.13 is: 9,900.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,839.27 : 17,718.01 = 7,174.13 : x
  2. Step 2: Convert to fraction form
    12,839.27/17,718.01 = 7,174.13/x
  3. Step 3: Cross multiply
    12,839.27x = 17,718.01 × 7,174.13
  4. Step 4: Simplify right side
    12,839.27x = 127,111,307.08
  5. Step 5: Solve for x
    x = 127,111,307.08/12,839.27
  6. Step 6: Final answer
    x = 9,900.20

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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.