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Finding the Fourth Proportional to 18,816.78, 28,204.86 and 8,277.42

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Solution

The fourth proportional to 18,816.78, 28,204.86 and 8,277.42 is: 12,407.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.78 : 28,204.86 = 8,277.42 : x
  2. Step 2: Convert to fraction form
    18,816.78/28,204.86 = 8,277.42/x
  3. Step 3: Cross multiply
    18,816.78x = 28,204.86 × 8,277.42
  4. Step 4: Simplify right side
    18,816.78x = 233,463,472.26
  5. Step 5: Solve for x
    x = 233,463,472.26/18,816.78
  6. Step 6: Final answer
    x = 12,407.20

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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.