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Finding the Fourth Proportional to 12,721.16, 17,555.14 and 7,132.16

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Solution

The fourth proportional to 12,721.16, 17,555.14 and 7,132.16 is: 9,842.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.16 : 17,555.14 = 7,132.16 : x
  2. Step 2: Convert to fraction form
    12,721.16/17,555.14 = 7,132.16/x
  3. Step 3: Cross multiply
    12,721.16x = 17,555.14 × 7,132.16
  4. Step 4: Simplify right side
    12,721.16x = 125,206,067.30
  5. Step 5: Solve for x
    x = 125,206,067.30/12,721.16
  6. Step 6: Final answer
    x = 9,842.35

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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.