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Finding the Fourth Proportional to 11,264.68, 15,530.68 and 7,721.56

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Solution

The fourth proportional to 11,264.68, 15,530.68 and 7,721.56 is: 10,645.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,264.68 : 15,530.68 = 7,721.56 : x
  2. Step 2: Convert to fraction form
    11,264.68/15,530.68 = 7,721.56/x
  3. Step 3: Cross multiply
    11,264.68x = 15,530.68 × 7,721.56
  4. Step 4: Simplify right side
    11,264.68x = 119,921,077.46
  5. Step 5: Solve for x
    x = 119,921,077.46/11,264.68
  6. Step 6: Final answer
    x = 10,645.76

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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.