Home / 30,936.48-42,691.86-16,789.20

Finding the Fourth Proportional to 30,936.48, 42,691.86 and 16,789.20

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Solution

The fourth proportional to 30,936.48, 42,691.86 and 16,789.20 is: 23,168.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,936.48 : 42,691.86 = 16,789.20 : x
  2. Step 2: Convert to fraction form
    30,936.48/42,691.86 = 16,789.20/x
  3. Step 3: Cross multiply
    30,936.48x = 42,691.86 × 16,789.20
  4. Step 4: Simplify right side
    30,936.48x = 716,762,175.91
  5. Step 5: Solve for x
    x = 716,762,175.91/30,936.48
  6. Step 6: Final answer
    x = 23,168.83

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1.5x scale

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.