Home / 31,120.66-42,945.21-16,972.66

Finding the Fourth Proportional to 31,120.66, 42,945.21 and 16,972.66

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Solution

The fourth proportional to 31,120.66, 42,945.21 and 16,972.66 is: 23,421.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,120.66 : 42,945.21 = 16,972.66 : x
  2. Step 2: Convert to fraction form
    31,120.66/42,945.21 = 16,972.66/x
  3. Step 3: Cross multiply
    31,120.66x = 42,945.21 × 16,972.66
  4. Step 4: Simplify right side
    31,120.66x = 728,894,447.96
  5. Step 5: Solve for x
    x = 728,894,447.96/31,120.66
  6. Step 6: Final answer
    x = 23,421.56

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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.