Home / 19,992.20-29,988.30-5,199.86

Finding the Fourth Proportional to 19,992.20, 29,988.30 and 5,199.86

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Solution

The fourth proportional to 19,992.20, 29,988.30 and 5,199.86 is: 7,799.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.20 : 29,988.30 = 5,199.86 : x
  2. Step 2: Convert to fraction form
    19,992.20/29,988.30 = 5,199.86/x
  3. Step 3: Cross multiply
    19,992.20x = 29,988.30 × 5,199.86
  4. Step 4: Simplify right side
    19,992.20x = 155,934,961.64
  5. Step 5: Solve for x
    x = 155,934,961.64/19,992.20
  6. Step 6: Final answer
    x = 7,799.79

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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.