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Finding the Fourth Proportional to 15,195.68, 20,969.88 and 8,906.84

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Solution

The fourth proportional to 15,195.68, 20,969.88 and 8,906.84 is: 12,291.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,195.68 : 20,969.88 = 8,906.84 : x
  2. Step 2: Convert to fraction form
    15,195.68/20,969.88 = 8,906.84/x
  3. Step 3: Cross multiply
    15,195.68x = 20,969.88 × 8,906.84
  4. Step 4: Simplify right side
    15,195.68x = 186,775,365.98
  5. Step 5: Solve for x
    x = 186,775,365.98/15,195.68
  6. Step 6: Final answer
    x = 12,291.35

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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.