Home / 31,108.55-42,929.12-16,961.09

Finding the Fourth Proportional to 31,108.55, 42,929.12 and 16,961.09

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Solution

The fourth proportional to 31,108.55, 42,929.12 and 16,961.09 is: 23,405.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.55 : 42,929.12 = 16,961.09 : x
  2. Step 2: Convert to fraction form
    31,108.55/42,929.12 = 16,961.09/x
  3. Step 3: Cross multiply
    31,108.55x = 42,929.12 × 16,961.09
  4. Step 4: Simplify right side
    31,108.55x = 728,124,495.70
  5. Step 5: Solve for x
    x = 728,124,495.70/31,108.55
  6. Step 6: Final answer
    x = 23,405.93

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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.