Home / 30,687.66-42,351.19-18,753.28

Finding the Fourth Proportional to 30,687.66, 42,351.19 and 18,753.28

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Solution

The fourth proportional to 30,687.66, 42,351.19 and 18,753.28 is: 25,880.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,687.66 : 42,351.19 = 18,753.28 : x
  2. Step 2: Convert to fraction form
    30,687.66/42,351.19 = 18,753.28/x
  3. Step 3: Cross multiply
    30,687.66x = 42,351.19 × 18,753.28
  4. Step 4: Simplify right side
    30,687.66x = 794,223,571.64
  5. Step 5: Solve for x
    x = 794,223,571.64/30,687.66
  6. Step 6: Final answer
    x = 25,880.88

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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.