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Finding the Fourth Proportional to 13,860.71, 20,782.71 and 5,845.92

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Solution

The fourth proportional to 13,860.71, 20,782.71 and 5,845.92 is: 8,765.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,860.71 : 20,782.71 = 5,845.92 : x
  2. Step 2: Convert to fraction form
    13,860.71/20,782.71 = 5,845.92/x
  3. Step 3: Cross multiply
    13,860.71x = 20,782.71 × 5,845.92
  4. Step 4: Simplify right side
    13,860.71x = 121,493,982.11
  5. Step 5: Solve for x
    x = 121,493,982.11/13,860.71
  6. Step 6: Final answer
    x = 8,765.35

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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.