Home / 31,728.69-43,784.09-18,988.88

Finding the Fourth Proportional to 31,728.69, 43,784.09 and 18,988.88

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Solution

The fourth proportional to 31,728.69, 43,784.09 and 18,988.88 is: 26,203.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,728.69 : 43,784.09 = 18,988.88 : x
  2. Step 2: Convert to fraction form
    31,728.69/43,784.09 = 18,988.88/x
  3. Step 3: Cross multiply
    31,728.69x = 43,784.09 × 18,988.88
  4. Step 4: Simplify right side
    31,728.69x = 831,410,517.05
  5. Step 5: Solve for x
    x = 831,410,517.05/31,728.69
  6. Step 6: Final answer
    x = 26,203.75

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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.