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Finding the Fourth Proportional to 15,072.08, 20,799.18 and 8,266.12

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Solution

The fourth proportional to 15,072.08, 20,799.18 and 8,266.12 is: 11,407.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072.08 : 20,799.18 = 8,266.12 : x
  2. Step 2: Convert to fraction form
    15,072.08/20,799.18 = 8,266.12/x
  3. Step 3: Cross multiply
    15,072.08x = 20,799.18 × 8,266.12
  4. Step 4: Simplify right side
    15,072.08x = 171,928,465.78
  5. Step 5: Solve for x
    x = 171,928,465.78/15,072.08
  6. Step 6: Final answer
    x = 11,407.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.