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Finding the Fourth Proportional to 18,968.99, 28,439.44 and 9,098.87

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Solution

The fourth proportional to 18,968.99, 28,439.44 and 9,098.87 is: 13,641.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,968.99 : 28,439.44 = 9,098.87 : x
  2. Step 2: Convert to fraction form
    18,968.99/28,439.44 = 9,098.87/x
  3. Step 3: Cross multiply
    18,968.99x = 28,439.44 × 9,098.87
  4. Step 4: Simplify right side
    18,968.99x = 258,766,602.49
  5. Step 5: Solve for x
    x = 258,766,602.49/18,968.99
  6. Step 6: Final answer
    x = 13,641.56

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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.