Home / 31,700.87-43,728.84-18,783.90

Finding the Fourth Proportional to 31,700.87, 43,728.84 and 18,783.90

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Solution

The fourth proportional to 31,700.87, 43,728.84 and 18,783.90 is: 25,910.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,700.87 : 43,728.84 = 18,783.90 : x
  2. Step 2: Convert to fraction form
    31,700.87/43,728.84 = 18,783.90/x
  3. Step 3: Cross multiply
    31,700.87x = 43,728.84 × 18,783.90
  4. Step 4: Simplify right side
    31,700.87x = 821,398,104.85
  5. Step 5: Solve for x
    x = 821,398,104.85/31,700.87
  6. Step 6: Final answer
    x = 25,910.90

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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.