Home / 12,721.12-17,555.28-7,132

Finding the Fourth Proportional to 12,721.12, 17,555.28 and 7,132

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Solution

The fourth proportional to 12,721.12, 17,555.28 and 7,132 is: 9,842.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.12 : 17,555.28 = 7,132 : x
  2. Step 2: Convert to fraction form
    12,721.12/17,555.28 = 7,132/x
  3. Step 3: Cross multiply
    12,721.12x = 17,555.28 × 7,132
  4. Step 4: Simplify right side
    12,721.12x = 125,204,256.96
  5. Step 5: Solve for x
    x = 125,204,256.96/12,721.12
  6. Step 6: Final answer
    x = 9,842.24

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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.