Home / 31,108.78-42,930.78-16,961.74

Finding the Fourth Proportional to 31,108.78, 42,930.78 and 16,961.74

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Solution

The fourth proportional to 31,108.78, 42,930.78 and 16,961.74 is: 23,407.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.78 : 42,930.78 = 16,961.74 : x
  2. Step 2: Convert to fraction form
    31,108.78/42,930.78 = 16,961.74/x
  3. Step 3: Cross multiply
    31,108.78x = 42,930.78 × 16,961.74
  4. Step 4: Simplify right side
    31,108.78x = 728,180,728.36
  5. Step 5: Solve for x
    x = 728,180,728.36/31,108.78
  6. Step 6: Final answer
    x = 23,407.56

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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.