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Finding the Fourth Proportional to 18,763.20, 28,127.52 and 8,907.12

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Solution

The fourth proportional to 18,763.20, 28,127.52 and 8,907.12 is: 13,352.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.20 : 28,127.52 = 8,907.12 : x
  2. Step 2: Convert to fraction form
    18,763.20/28,127.52 = 8,907.12/x
  3. Step 3: Cross multiply
    18,763.20x = 28,127.52 × 8,907.12
  4. Step 4: Simplify right side
    18,763.20x = 250,535,195.94
  5. Step 5: Solve for x
    x = 250,535,195.94/18,763.20
  6. Step 6: Final answer
    x = 13,352.48

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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.