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Finding the Fourth Proportional to 13,954.86, 20,933.01 and 5,521.41

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Solution

The fourth proportional to 13,954.86, 20,933.01 and 5,521.41 is: 8,282.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,954.86 : 20,933.01 = 5,521.41 : x
  2. Step 2: Convert to fraction form
    13,954.86/20,933.01 = 5,521.41/x
  3. Step 3: Cross multiply
    13,954.86x = 20,933.01 × 5,521.41
  4. Step 4: Simplify right side
    13,954.86x = 115,579,730.74
  5. Step 5: Solve for x
    x = 115,579,730.74/13,954.86
  6. Step 6: Final answer
    x = 8,282.40

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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.