Home / 21,185.72-31,778.80-6,394.76

Finding the Fourth Proportional to 21,185.72, 31,778.80 and 6,394.76

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Solution

The fourth proportional to 21,185.72, 31,778.80 and 6,394.76 is: 9,592.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.72 : 31,778.80 = 6,394.76 : x
  2. Step 2: Convert to fraction form
    21,185.72/31,778.80 = 6,394.76/x
  3. Step 3: Cross multiply
    21,185.72x = 31,778.80 × 6,394.76
  4. Step 4: Simplify right side
    21,185.72x = 203,217,799.09
  5. Step 5: Solve for x
    x = 203,217,799.09/21,185.72
  6. Step 6: Final answer
    x = 9,592.21

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1.5x scale

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.