Home / 18,990.92-28,456.18-12,727.87

Finding the Fourth Proportional to 18,990.92, 28,456.18 and 12,727.87

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Solution

The fourth proportional to 18,990.92, 28,456.18 and 12,727.87 is: 19,071.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.92 : 28,456.18 = 12,727.87 : x
  2. Step 2: Convert to fraction form
    18,990.92/28,456.18 = 12,727.87/x
  3. Step 3: Cross multiply
    18,990.92x = 28,456.18 × 12,727.87
  4. Step 4: Simplify right side
    18,990.92x = 362,186,456.78
  5. Step 5: Solve for x
    x = 362,186,456.78/18,990.92
  6. Step 6: Final answer
    x = 19,071.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.