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Finding the Fourth Proportional to 27,860.71, 41,789.60 and 9,138.28

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Solution

The fourth proportional to 27,860.71, 41,789.60 and 9,138.28 is: 13,706.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,860.71 : 41,789.60 = 9,138.28 : x
  2. Step 2: Convert to fraction form
    27,860.71/41,789.60 = 9,138.28/x
  3. Step 3: Cross multiply
    27,860.71x = 41,789.60 × 9,138.28
  4. Step 4: Simplify right side
    27,860.71x = 381,885,061.41
  5. Step 5: Solve for x
    x = 381,885,061.41/27,860.71
  6. Step 6: Final answer
    x = 13,706.94

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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.