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Finding the Fourth Proportional to 18,969.11, 28,439.58 and 9,098.99

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Solution

The fourth proportional to 18,969.11, 28,439.58 and 9,098.99 is: 13,641.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.11 : 28,439.58 = 9,098.99 : x
  2. Step 2: Convert to fraction form
    18,969.11/28,439.58 = 9,098.99/x
  3. Step 3: Cross multiply
    18,969.11x = 28,439.58 × 9,098.99
  4. Step 4: Simplify right side
    18,969.11x = 258,771,454.02
  5. Step 5: Solve for x
    x = 258,771,454.02/18,969.11
  6. Step 6: Final answer
    x = 13,641.73

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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.