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Finding the Fourth Proportional to 28,708, 39,628.12 and 19,144.42

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Solution

The fourth proportional to 28,708, 39,628.12 and 19,144.42 is: 26,426.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,708 : 39,628.12 = 19,144.42 : x
  2. Step 2: Convert to fraction form
    28,708/39,628.12 = 19,144.42/x
  3. Step 3: Cross multiply
    28,708x = 39,628.12 × 19,144.42
  4. Step 4: Simplify right side
    28,708x = 758,657,373.09
  5. Step 5: Solve for x
    x = 758,657,373.09/28,708
  6. Step 6: Final answer
    x = 26,426.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.