Home / 21,315.55-31,982.53-11,443.30

Finding the Fourth Proportional to 21,315.55, 31,982.53 and 11,443.30

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Solution

The fourth proportional to 21,315.55, 31,982.53 and 11,443.30 is: 17,169.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.55 : 31,982.53 = 11,443.30 : x
  2. Step 2: Convert to fraction form
    21,315.55/31,982.53 = 11,443.30/x
  3. Step 3: Cross multiply
    21,315.55x = 31,982.53 × 11,443.30
  4. Step 4: Simplify right side
    21,315.55x = 365,985,685.55
  5. Step 5: Solve for x
    x = 365,985,685.55/21,315.55
  6. Step 6: Final answer
    x = 17,169.89

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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.