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Finding the Fourth Proportional to 28,616.40, 39,371.40 and 27,838.80

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Solution

The fourth proportional to 28,616.40, 39,371.40 and 27,838.80 is: 38,301.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,616.40 : 39,371.40 = 27,838.80 : x
  2. Step 2: Convert to fraction form
    28,616.40/39,371.40 = 27,838.80/x
  3. Step 3: Cross multiply
    28,616.40x = 39,371.40 × 27,838.80
  4. Step 4: Simplify right side
    28,616.40x = 1,096,052,530.32
  5. Step 5: Solve for x
    x = 1,096,052,530.32/28,616.40
  6. Step 6: Final answer
    x = 38,301.55

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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.