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Finding the Fourth Proportional to 18,398.40, 27,609.32 and 7,868.48

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Solution

The fourth proportional to 18,398.40, 27,609.32 and 7,868.48 is: 11,807.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.40 : 27,609.32 = 7,868.48 : x
  2. Step 2: Convert to fraction form
    18,398.40/27,609.32 = 7,868.48/x
  3. Step 3: Cross multiply
    18,398.40x = 27,609.32 × 7,868.48
  4. Step 4: Simplify right side
    18,398.40x = 217,243,382.23
  5. Step 5: Solve for x
    x = 217,243,382.23/18,398.40
  6. Step 6: Final answer
    x = 11,807.73

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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.