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Finding the Fourth Proportional to 18,799.71, 28,199.49 and 8,404.17

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Solution

The fourth proportional to 18,799.71, 28,199.49 and 8,404.17 is: 12,606.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,799.71 : 28,199.49 = 8,404.17 : x
  2. Step 2: Convert to fraction form
    18,799.71/28,199.49 = 8,404.17/x
  3. Step 3: Cross multiply
    18,799.71x = 28,199.49 × 8,404.17
  4. Step 4: Simplify right side
    18,799.71x = 236,993,307.87
  5. Step 5: Solve for x
    x = 236,993,307.87/18,799.71
  6. Step 6: Final answer
    x = 12,606.22

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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.