Home / 31,108.37-42,929.47-16,961.21

Finding the Fourth Proportional to 31,108.37, 42,929.47 and 16,961.21

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Solution

The fourth proportional to 31,108.37, 42,929.47 and 16,961.21 is: 23,406.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.37 : 42,929.47 = 16,961.21 : x
  2. Step 2: Convert to fraction form
    31,108.37/42,929.47 = 16,961.21/x
  3. Step 3: Cross multiply
    31,108.37x = 42,929.47 × 16,961.21
  4. Step 4: Simplify right side
    31,108.37x = 728,135,723.40
  5. Step 5: Solve for x
    x = 728,135,723.40/31,108.37
  6. Step 6: Final answer
    x = 23,406.43

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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.