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Finding the Fourth Proportional to 19,292.64, 28,942.56 and 8,763.40

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Solution

The fourth proportional to 19,292.64, 28,942.56 and 8,763.40 is: 13,146.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,292.64 : 28,942.56 = 8,763.40 : x
  2. Step 2: Convert to fraction form
    19,292.64/28,942.56 = 8,763.40/x
  3. Step 3: Cross multiply
    19,292.64x = 28,942.56 × 8,763.40
  4. Step 4: Simplify right side
    19,292.64x = 253,635,230.30
  5. Step 5: Solve for x
    x = 253,635,230.30/19,292.64
  6. Step 6: Final answer
    x = 13,146.74

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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.