Home / 15,755.25-21,742.31-8,681.52

Finding the Fourth Proportional to 15,755.25, 21,742.31 and 8,681.52

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Solution

The fourth proportional to 15,755.25, 21,742.31 and 8,681.52 is: 11,980.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,755.25 : 21,742.31 = 8,681.52 : x
  2. Step 2: Convert to fraction form
    15,755.25/21,742.31 = 8,681.52/x
  3. Step 3: Cross multiply
    15,755.25x = 21,742.31 × 8,681.52
  4. Step 4: Simplify right side
    15,755.25x = 188,756,320.82
  5. Step 5: Solve for x
    x = 188,756,320.82/15,755.25
  6. Step 6: Final answer
    x = 11,980.53

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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.