Home / 18,724.95-28,072.20-12,786.87

Finding the Fourth Proportional to 18,724.95, 28,072.20 and 12,786.87

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Solution

The fourth proportional to 18,724.95, 28,072.20 and 12,786.87 is: 19,169.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724.95 : 28,072.20 = 12,786.87 : x
  2. Step 2: Convert to fraction form
    18,724.95/28,072.20 = 12,786.87/x
  3. Step 3: Cross multiply
    18,724.95x = 28,072.20 × 12,786.87
  4. Step 4: Simplify right side
    18,724.95x = 358,955,572.01
  5. Step 5: Solve for x
    x = 358,955,572.01/18,724.95
  6. Step 6: Final answer
    x = 19,169.91

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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.