Home / 31,108.86-42,930.10-16,961.70

Finding the Fourth Proportional to 31,108.86, 42,930.10 and 16,961.70

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Solution

The fourth proportional to 31,108.86, 42,930.10 and 16,961.70 is: 23,407.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.86 : 42,930.10 = 16,961.70 : x
  2. Step 2: Convert to fraction form
    31,108.86/42,930.10 = 16,961.70/x
  3. Step 3: Cross multiply
    31,108.86x = 42,930.10 × 16,961.70
  4. Step 4: Simplify right side
    31,108.86x = 728,167,659.36
  5. Step 5: Solve for x
    x = 728,167,659.36/31,108.86
  6. Step 6: Final answer
    x = 23,407.08

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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.