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Finding the Fourth Proportional to 13,651.86, 20,478.06 and 5,860.74

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Solution

The fourth proportional to 13,651.86, 20,478.06 and 5,860.74 is: 8,791.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,651.86 : 20,478.06 = 5,860.74 : x
  2. Step 2: Convert to fraction form
    13,651.86/20,478.06 = 5,860.74/x
  3. Step 3: Cross multiply
    13,651.86x = 20,478.06 × 5,860.74
  4. Step 4: Simplify right side
    13,651.86x = 120,016,585.36
  5. Step 5: Solve for x
    x = 120,016,585.36/13,651.86
  6. Step 6: Final answer
    x = 8,791.23

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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.