Home / 21,199.72-31,799.88-6,408.76

Finding the Fourth Proportional to 21,199.72, 31,799.88 and 6,408.76

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Solution

The fourth proportional to 21,199.72, 31,799.88 and 6,408.76 is: 9,613.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.72 : 31,799.88 = 6,408.76 : x
  2. Step 2: Convert to fraction form
    21,199.72/31,799.88 = 6,408.76/x
  3. Step 3: Cross multiply
    21,199.72x = 31,799.88 × 6,408.76
  4. Step 4: Simplify right side
    21,199.72x = 203,797,798.95
  5. Step 5: Solve for x
    x = 203,797,798.95/21,199.72
  6. Step 6: Final answer
    x = 9,613.23

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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.