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Finding the Fourth Proportional to 28,104.30, 42,163.07 and 9,128.86

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Solution

The fourth proportional to 28,104.30, 42,163.07 and 9,128.86 is: 13,695.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,104.30 : 42,163.07 = 9,128.86 : x
  2. Step 2: Convert to fraction form
    28,104.30/42,163.07 = 9,128.86/x
  3. Step 3: Cross multiply
    28,104.30x = 42,163.07 × 9,128.86
  4. Step 4: Simplify right side
    28,104.30x = 384,900,763.20
  5. Step 5: Solve for x
    x = 384,900,763.20/28,104.30
  6. Step 6: Final answer
    x = 13,695.44

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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.