Home / 18,725.78-28,087.14-5,578.15

Finding the Fourth Proportional to 18,725.78, 28,087.14 and 5,578.15

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Solution

The fourth proportional to 18,725.78, 28,087.14 and 5,578.15 is: 8,366.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,725.78 : 28,087.14 = 5,578.15 : x
  2. Step 2: Convert to fraction form
    18,725.78/28,087.14 = 5,578.15/x
  3. Step 3: Cross multiply
    18,725.78x = 28,087.14 × 5,578.15
  4. Step 4: Simplify right side
    18,725.78x = 156,674,279.99
  5. Step 5: Solve for x
    x = 156,674,279.99/18,725.78
  6. Step 6: Final answer
    x = 8,366.77

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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.