Home / 21,199.84-31,799.92-6,408.80

Finding the Fourth Proportional to 21,199.84, 31,799.92 and 6,408.80

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Solution

The fourth proportional to 21,199.84, 31,799.92 and 6,408.80 is: 9,613.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.84 : 31,799.92 = 6,408.80 : x
  2. Step 2: Convert to fraction form
    21,199.84/31,799.92 = 6,408.80/x
  3. Step 3: Cross multiply
    21,199.84x = 31,799.92 × 6,408.80
  4. Step 4: Simplify right side
    21,199.84x = 203,799,327.30
  5. Step 5: Solve for x
    x = 203,799,327.30/21,199.84
  6. Step 6: Final answer
    x = 9,613.25

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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.