Home / 30,986.80-42,761.91-16,839.64

Finding the Fourth Proportional to 30,986.80, 42,761.91 and 16,839.64

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Solution

The fourth proportional to 30,986.80, 42,761.91 and 16,839.64 is: 23,238.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,986.80 : 42,761.91 = 16,839.64 : x
  2. Step 2: Convert to fraction form
    30,986.80/42,761.91 = 16,839.64/x
  3. Step 3: Cross multiply
    30,986.80x = 42,761.91 × 16,839.64
  4. Step 4: Simplify right side
    30,986.80x = 720,095,170.11
  5. Step 5: Solve for x
    x = 720,095,170.11/30,986.80
  6. Step 6: Final answer
    x = 23,238.77

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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.