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Finding the Fourth Proportional to 15,193.71, 20,968.88 and 8,908.11

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Solution

The fourth proportional to 15,193.71, 20,968.88 and 8,908.11 is: 12,294.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,193.71 : 20,968.88 = 8,908.11 : x
  2. Step 2: Convert to fraction form
    15,193.71/20,968.88 = 8,908.11/x
  3. Step 3: Cross multiply
    15,193.71x = 20,968.88 × 8,908.11
  4. Step 4: Simplify right side
    15,193.71x = 186,793,045.08
  5. Step 5: Solve for x
    x = 186,793,045.08/15,193.71
  6. Step 6: Final answer
    x = 12,294.10

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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.