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Finding the Fourth Proportional to 13,794.71, 20,689.31 and 3,931.34

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Solution

The fourth proportional to 13,794.71, 20,689.31 and 3,931.34 is: 5,896.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,794.71 : 20,689.31 = 3,931.34 : x
  2. Step 2: Convert to fraction form
    13,794.71/20,689.31 = 3,931.34/x
  3. Step 3: Cross multiply
    13,794.71x = 20,689.31 × 3,931.34
  4. Step 4: Simplify right side
    13,794.71x = 81,336,618.36
  5. Step 5: Solve for x
    x = 81,336,618.36/13,794.71
  6. Step 6: Final answer
    x = 5,896.22

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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.