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Finding the Fourth Proportional to 20,376.71, 30,561.79 and 5,582.17

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Solution

The fourth proportional to 20,376.71, 30,561.79 and 5,582.17 is: 8,372.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.71 : 30,561.79 = 5,582.17 : x
  2. Step 2: Convert to fraction form
    20,376.71/30,561.79 = 5,582.17/x
  3. Step 3: Cross multiply
    20,376.71x = 30,561.79 × 5,582.17
  4. Step 4: Simplify right side
    20,376.71x = 170,601,107.28
  5. Step 5: Solve for x
    x = 170,601,107.28/20,376.71
  6. Step 6: Final answer
    x = 8,372.36

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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.