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Finding the Fourth Proportional to 3,888.54, 5,366.25 and 2,187

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Solution

The fourth proportional to 3,888.54, 5,366.25 and 2,187 is: 3,018.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.54 : 5,366.25 = 2,187 : x
  2. Step 2: Convert to fraction form
    3,888.54/5,366.25 = 2,187/x
  3. Step 3: Cross multiply
    3,888.54x = 5,366.25 × 2,187
  4. Step 4: Simplify right side
    3,888.54x = 11,735,988.75
  5. Step 5: Solve for x
    x = 11,735,988.75/3,888.54
  6. Step 6: Final answer
    x = 3,018.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.