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Finding the Fourth Proportional to 19,672.78, 27,147.42 and 10,719.70

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Solution

The fourth proportional to 19,672.78, 27,147.42 and 10,719.70 is: 14,792.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,672.78 : 27,147.42 = 10,719.70 : x
  2. Step 2: Convert to fraction form
    19,672.78/27,147.42 = 10,719.70/x
  3. Step 3: Cross multiply
    19,672.78x = 27,147.42 × 10,719.70
  4. Step 4: Simplify right side
    19,672.78x = 291,012,198.17
  5. Step 5: Solve for x
    x = 291,012,198.17/19,672.78
  6. Step 6: Final answer
    x = 14,792.63

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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.