Home / 30,990.36-42,754.86-19,049.88

Finding the Fourth Proportional to 30,990.36, 42,754.86 and 19,049.88

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Solution

The fourth proportional to 30,990.36, 42,754.86 and 19,049.88 is: 26,281.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,990.36 : 42,754.86 = 19,049.88 : x
  2. Step 2: Convert to fraction form
    30,990.36/42,754.86 = 19,049.88/x
  3. Step 3: Cross multiply
    30,990.36x = 42,754.86 × 19,049.88
  4. Step 4: Simplify right side
    30,990.36x = 814,474,952.42
  5. Step 5: Solve for x
    x = 814,474,952.42/30,990.36
  6. Step 6: Final answer
    x = 26,281.56

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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.