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Finding the Fourth Proportional to 30,911.52, 42,658.02 and 16,764.60

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Solution

The fourth proportional to 30,911.52, 42,658.02 and 16,764.60 is: 23,135.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,911.52 : 42,658.02 = 16,764.60 : x
  2. Step 2: Convert to fraction form
    30,911.52/42,658.02 = 16,764.60/x
  3. Step 3: Cross multiply
    30,911.52x = 42,658.02 × 16,764.60
  4. Step 4: Simplify right side
    30,911.52x = 715,144,642.09
  5. Step 5: Solve for x
    x = 715,144,642.09/30,911.52
  6. Step 6: Final answer
    x = 23,135.21

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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.