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Finding the Fourth Proportional to 10,481, 15,721.68 and 3,555.68

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Solution

The fourth proportional to 10,481, 15,721.68 and 3,555.68 is: 5,333.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,481 : 15,721.68 = 3,555.68 : x
  2. Step 2: Convert to fraction form
    10,481/15,721.68 = 3,555.68/x
  3. Step 3: Cross multiply
    10,481x = 15,721.68 × 3,555.68
  4. Step 4: Simplify right side
    10,481x = 55,901,263.14
  5. Step 5: Solve for x
    x = 55,901,263.14/10,481
  6. Step 6: Final answer
    x = 5,333.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.