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Finding the Fourth Proportional to 18,816.71, 28,223.62 and 6,964.92

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Solution

The fourth proportional to 18,816.71, 28,223.62 and 6,964.92 is: 10,446.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.71 : 28,223.62 = 6,964.92 : x
  2. Step 2: Convert to fraction form
    18,816.71/28,223.62 = 6,964.92/x
  3. Step 3: Cross multiply
    18,816.71x = 28,223.62 × 6,964.92
  4. Step 4: Simplify right side
    18,816.71x = 196,575,277.18
  5. Step 5: Solve for x
    x = 196,575,277.18/18,816.71
  6. Step 6: Final answer
    x = 10,446.85

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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.