Home / 12,718.27-17,551.21-7,129.27

Finding the Fourth Proportional to 12,718.27, 17,551.21 and 7,129.27

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Solution

The fourth proportional to 12,718.27, 17,551.21 and 7,129.27 is: 9,838.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,718.27 : 17,551.21 = 7,129.27 : x
  2. Step 2: Convert to fraction form
    12,718.27/17,551.21 = 7,129.27/x
  3. Step 3: Cross multiply
    12,718.27x = 17,551.21 × 7,129.27
  4. Step 4: Simplify right side
    12,718.27x = 125,127,213.62
  5. Step 5: Solve for x
    x = 125,127,213.62/12,718.27
  6. Step 6: Final answer
    x = 9,838.39

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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.