Home / 10,221.76-15,329.16-3,981.28

Finding the Fourth Proportional to 10,221.76, 15,329.16 and 3,981.28

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Solution

The fourth proportional to 10,221.76, 15,329.16 and 3,981.28 is: 5,970.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,221.76 : 15,329.16 = 3,981.28 : x
  2. Step 2: Convert to fraction form
    10,221.76/15,329.16 = 3,981.28/x
  3. Step 3: Cross multiply
    10,221.76x = 15,329.16 × 3,981.28
  4. Step 4: Simplify right side
    10,221.76x = 61,029,678.12
  5. Step 5: Solve for x
    x = 61,029,678.12/10,221.76
  6. Step 6: Final answer
    x = 5,970.56

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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.