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Finding the Fourth Proportional to 18,991.49, 28,486.92 and 7,307.24

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Solution

The fourth proportional to 18,991.49, 28,486.92 and 7,307.24 is: 10,960.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.49 : 28,486.92 = 7,307.24 : x
  2. Step 2: Convert to fraction form
    18,991.49/28,486.92 = 7,307.24/x
  3. Step 3: Cross multiply
    18,991.49x = 28,486.92 × 7,307.24
  4. Step 4: Simplify right side
    18,991.49x = 208,160,761.30
  5. Step 5: Solve for x
    x = 208,160,761.30/18,991.49
  6. Step 6: Final answer
    x = 10,960.74

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.