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Finding the Fourth Proportional to 15,191.94, 20,990.57 and 10,934.58

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Solution

The fourth proportional to 15,191.94, 20,990.57 and 10,934.58 is: 15,108.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.94 : 20,990.57 = 10,934.58 : x
  2. Step 2: Convert to fraction form
    15,191.94/20,990.57 = 10,934.58/x
  3. Step 3: Cross multiply
    15,191.94x = 20,990.57 × 10,934.58
  4. Step 4: Simplify right side
    15,191.94x = 229,523,066.91
  5. Step 5: Solve for x
    x = 229,523,066.91/15,191.94
  6. Step 6: Final answer
    x = 15,108.21

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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.