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Finding the Fourth Proportional to 12,381.71, 17,083.66 and 7,345.69

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Solution

The fourth proportional to 12,381.71, 17,083.66 and 7,345.69 is: 10,135.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.71 : 17,083.66 = 7,345.69 : x
  2. Step 2: Convert to fraction form
    12,381.71/17,083.66 = 7,345.69/x
  3. Step 3: Cross multiply
    12,381.71x = 17,083.66 × 7,345.69
  4. Step 4: Simplify right side
    12,381.71x = 125,491,223.13
  5. Step 5: Solve for x
    x = 125,491,223.13/12,381.71
  6. Step 6: Final answer
    x = 10,135.21

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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.