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Finding the Fourth Proportional to 15,197.18, 20,971.95 and 8,908.34

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Solution

The fourth proportional to 15,197.18, 20,971.95 and 8,908.34 is: 12,293.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,197.18 : 20,971.95 = 8,908.34 : x
  2. Step 2: Convert to fraction form
    15,197.18/20,971.95 = 8,908.34/x
  3. Step 3: Cross multiply
    15,197.18x = 20,971.95 × 8,908.34
  4. Step 4: Simplify right side
    15,197.18x = 186,825,261.06
  5. Step 5: Solve for x
    x = 186,825,261.06/15,197.18
  6. Step 6: Final answer
    x = 12,293.42

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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.