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Finding the Fourth Proportional to 18,723.15, 28,098.09 and 8,864.64

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Solution

The fourth proportional to 18,723.15, 28,098.09 and 8,864.64 is: 13,303.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.15 : 28,098.09 = 8,864.64 : x
  2. Step 2: Convert to fraction form
    18,723.15/28,098.09 = 8,864.64/x
  3. Step 3: Cross multiply
    18,723.15x = 28,098.09 × 8,864.64
  4. Step 4: Simplify right side
    18,723.15x = 249,079,452.54
  5. Step 5: Solve for x
    x = 249,079,452.54/18,723.15
  6. Step 6: Final answer
    x = 13,303.29

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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.