Home / 11,921.21-17,882.18-5,681.90

Finding the Fourth Proportional to 11,921.21, 17,882.18 and 5,681.90

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Solution

The fourth proportional to 11,921.21, 17,882.18 and 5,681.90 is: 8,523.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.21 : 17,882.18 = 5,681.90 : x
  2. Step 2: Convert to fraction form
    11,921.21/17,882.18 = 5,681.90/x
  3. Step 3: Cross multiply
    11,921.21x = 17,882.18 × 5,681.90
  4. Step 4: Simplify right side
    11,921.21x = 101,604,683.34
  5. Step 5: Solve for x
    x = 101,604,683.34/11,921.21
  6. Step 6: Final answer
    x = 8,523.02

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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.