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Finding the Fourth Proportional to 18,903.38, 28,387.46 and 17,918.42

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Solution

The fourth proportional to 18,903.38, 28,387.46 and 17,918.42 is: 26,908.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.38 : 28,387.46 = 17,918.42 : x
  2. Step 2: Convert to fraction form
    18,903.38/28,387.46 = 17,918.42/x
  3. Step 3: Cross multiply
    18,903.38x = 28,387.46 × 17,918.42
  4. Step 4: Simplify right side
    18,903.38x = 508,658,333.87
  5. Step 5: Solve for x
    x = 508,658,333.87/18,903.38
  6. Step 6: Final answer
    x = 26,908.33

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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.