Home / 30,986.28-42,761.88-16,839.14

Finding the Fourth Proportional to 30,986.28, 42,761.88 and 16,839.14

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Solution

The fourth proportional to 30,986.28, 42,761.88 and 16,839.14 is: 23,238.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,986.28 : 42,761.88 = 16,839.14 : x
  2. Step 2: Convert to fraction form
    30,986.28/42,761.88 = 16,839.14/x
  3. Step 3: Cross multiply
    30,986.28x = 42,761.88 × 16,839.14
  4. Step 4: Simplify right side
    30,986.28x = 720,073,070.17
  5. Step 5: Solve for x
    x = 720,073,070.17/30,986.28
  6. Step 6: Final answer
    x = 23,238.45

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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.