Home / 21,185.56-31,765.98-6,390.04

Finding the Fourth Proportional to 21,185.56, 31,765.98 and 6,390.04

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Solution

The fourth proportional to 21,185.56, 31,765.98 and 6,390.04 is: 9,581.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.56 : 31,765.98 = 6,390.04 : x
  2. Step 2: Convert to fraction form
    21,185.56/31,765.98 = 6,390.04/x
  3. Step 3: Cross multiply
    21,185.56x = 31,765.98 × 6,390.04
  4. Step 4: Simplify right side
    21,185.56x = 202,985,882.84
  5. Step 5: Solve for x
    x = 202,985,882.84/21,185.56
  6. Step 6: Final answer
    x = 9,581.33

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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.