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Finding the Fourth Proportional to 18,909.16, 28,364.01 and 7,223.02

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Solution

The fourth proportional to 18,909.16, 28,364.01 and 7,223.02 is: 10,834.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.16 : 28,364.01 = 7,223.02 : x
  2. Step 2: Convert to fraction form
    18,909.16/28,364.01 = 7,223.02/x
  3. Step 3: Cross multiply
    18,909.16x = 28,364.01 × 7,223.02
  4. Step 4: Simplify right side
    18,909.16x = 204,873,811.51
  5. Step 5: Solve for x
    x = 204,873,811.51/18,909.16
  6. Step 6: Final answer
    x = 10,834.63

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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.