Home / 11,886.30-17,829.45-3,121.20

Finding the Fourth Proportional to 11,886.30, 17,829.45 and 3,121.20

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Solution

The fourth proportional to 11,886.30, 17,829.45 and 3,121.20 is: 4,681.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,886.30 : 17,829.45 = 3,121.20 : x
  2. Step 2: Convert to fraction form
    11,886.30/17,829.45 = 3,121.20/x
  3. Step 3: Cross multiply
    11,886.30x = 17,829.45 × 3,121.20
  4. Step 4: Simplify right side
    11,886.30x = 55,649,279.34
  5. Step 5: Solve for x
    x = 55,649,279.34/11,886.30
  6. Step 6: Final answer
    x = 4,681.80

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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.