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Finding the Fourth Proportional to 39,684.72, 54,756.36 and 22,908

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Solution

The fourth proportional to 39,684.72, 54,756.36 and 22,908 is: 31,608.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,684.72 : 54,756.36 = 22,908 : x
  2. Step 2: Convert to fraction form
    39,684.72/54,756.36 = 22,908/x
  3. Step 3: Cross multiply
    39,684.72x = 54,756.36 × 22,908
  4. Step 4: Simplify right side
    39,684.72x = 1,254,358,694.88
  5. Step 5: Solve for x
    x = 1,254,358,694.88/39,684.72
  6. Step 6: Final answer
    x = 31,608.10

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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.