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Finding the Fourth Proportional to 12,799.90, 19,199.19 and 4,906.20

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Solution

The fourth proportional to 12,799.90, 19,199.19 and 4,906.20 is: 7,359.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,799.90 : 19,199.19 = 4,906.20 : x
  2. Step 2: Convert to fraction form
    12,799.90/19,199.19 = 4,906.20/x
  3. Step 3: Cross multiply
    12,799.90x = 19,199.19 × 4,906.20
  4. Step 4: Simplify right side
    12,799.90x = 94,195,065.98
  5. Step 5: Solve for x
    x = 94,195,065.98/12,799.90
  6. Step 6: Final answer
    x = 7,359.05

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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.