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Finding the Fourth Proportional to 20,399.69, 30,599.49 and 11,510.98

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Solution

The fourth proportional to 20,399.69, 30,599.49 and 11,510.98 is: 17,266.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.69 : 30,599.49 = 11,510.98 : x
  2. Step 2: Convert to fraction form
    20,399.69/30,599.49 = 11,510.98/x
  3. Step 3: Cross multiply
    20,399.69x = 30,599.49 × 11,510.98
  4. Step 4: Simplify right side
    20,399.69x = 352,230,191.44
  5. Step 5: Solve for x
    x = 352,230,191.44/20,399.69
  6. Step 6: Final answer
    x = 17,266.45

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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.