Home / 31,108.62-42,930.09-16,961.70

Finding the Fourth Proportional to 31,108.62, 42,930.09 and 16,961.70

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Solution

The fourth proportional to 31,108.62, 42,930.09 and 16,961.70 is: 23,407.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.62 : 42,930.09 = 16,961.70 : x
  2. Step 2: Convert to fraction form
    31,108.62/42,930.09 = 16,961.70/x
  3. Step 3: Cross multiply
    31,108.62x = 42,930.09 × 16,961.70
  4. Step 4: Simplify right side
    31,108.62x = 728,167,307.55
  5. Step 5: Solve for x
    x = 728,167,307.55/31,108.62
  6. Step 6: Final answer
    x = 23,407.25

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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.