Home / 31,318.94-43,220.32-16,978.88

Finding the Fourth Proportional to 31,318.94, 43,220.32 and 16,978.88

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Solution

The fourth proportional to 31,318.94, 43,220.32 and 16,978.88 is: 23,430.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,318.94 : 43,220.32 = 16,978.88 : x
  2. Step 2: Convert to fraction form
    31,318.94/43,220.32 = 16,978.88/x
  3. Step 3: Cross multiply
    31,318.94x = 43,220.32 × 16,978.88
  4. Step 4: Simplify right side
    31,318.94x = 733,832,626.84
  5. Step 5: Solve for x
    x = 733,832,626.84/31,318.94
  6. Step 6: Final answer
    x = 23,430.95

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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.