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Finding the Fourth Proportional to 18,578.40, 27,865.08 and 4,727.40

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Solution

The fourth proportional to 18,578.40, 27,865.08 and 4,727.40 is: 7,090.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578.40 : 27,865.08 = 4,727.40 : x
  2. Step 2: Convert to fraction form
    18,578.40/27,865.08 = 4,727.40/x
  3. Step 3: Cross multiply
    18,578.40x = 27,865.08 × 4,727.40
  4. Step 4: Simplify right side
    18,578.40x = 131,729,379.19
  5. Step 5: Solve for x
    x = 131,729,379.19/18,578.40
  6. Step 6: Final answer
    x = 7,090.46

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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.