Home / 11,721.12-17,581.80-3,929.70

Finding the Fourth Proportional to 11,721.12, 17,581.80 and 3,929.70

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Solution

The fourth proportional to 11,721.12, 17,581.80 and 3,929.70 is: 5,894.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,721.12 : 17,581.80 = 3,929.70 : x
  2. Step 2: Convert to fraction form
    11,721.12/17,581.80 = 3,929.70/x
  3. Step 3: Cross multiply
    11,721.12x = 17,581.80 × 3,929.70
  4. Step 4: Simplify right side
    11,721.12x = 69,091,199.46
  5. Step 5: Solve for x
    x = 69,091,199.46/11,721.12
  6. Step 6: Final answer
    x = 5,894.59

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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.