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Finding the Fourth Proportional to 18,922.22, 28,357.56 and 8,925.40

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Solution

The fourth proportional to 18,922.22, 28,357.56 and 8,925.40 is: 13,375.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,922.22 : 28,357.56 = 8,925.40 : x
  2. Step 2: Convert to fraction form
    18,922.22/28,357.56 = 8,925.40/x
  3. Step 3: Cross multiply
    18,922.22x = 28,357.56 × 8,925.40
  4. Step 4: Simplify right side
    18,922.22x = 253,102,566.02
  5. Step 5: Solve for x
    x = 253,102,566.02/18,922.22
  6. Step 6: Final answer
    x = 13,375.94

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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.