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Finding the Fourth Proportional to 12,839.36, 17,718.11 and 7,174.19

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Solution

The fourth proportional to 12,839.36, 17,718.11 and 7,174.19 is: 9,900.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,839.36 : 17,718.11 = 7,174.19 : x
  2. Step 2: Convert to fraction form
    12,839.36/17,718.11 = 7,174.19/x
  3. Step 3: Cross multiply
    12,839.36x = 17,718.11 × 7,174.19
  4. Step 4: Simplify right side
    12,839.36x = 127,113,051.71
  5. Step 5: Solve for x
    x = 127,113,051.71/12,839.36
  6. Step 6: Final answer
    x = 9,900.26

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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.