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Finding the Fourth Proportional to 28,128.16, 42,198 and 9,410.08

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Solution

The fourth proportional to 28,128.16, 42,198 and 9,410.08 is: 14,117.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.16 : 42,198 = 9,410.08 : x
  2. Step 2: Convert to fraction form
    28,128.16/42,198 = 9,410.08/x
  3. Step 3: Cross multiply
    28,128.16x = 42,198 × 9,410.08
  4. Step 4: Simplify right side
    28,128.16x = 397,086,555.84
  5. Step 5: Solve for x
    x = 397,086,555.84/28,128.16
  6. Step 6: Final answer
    x = 14,117.05

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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.