Home / 20,389.10-30,578.92-5,599.21

Finding the Fourth Proportional to 20,389.10, 30,578.92 and 5,599.21

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Solution

The fourth proportional to 20,389.10, 30,578.92 and 5,599.21 is: 8,397.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.10 : 30,578.92 = 5,599.21 : x
  2. Step 2: Convert to fraction form
    20,389.10/30,578.92 = 5,599.21/x
  3. Step 3: Cross multiply
    20,389.10x = 30,578.92 × 5,599.21
  4. Step 4: Simplify right side
    20,389.10x = 171,217,761.54
  5. Step 5: Solve for x
    x = 171,217,761.54/20,389.10
  6. Step 6: Final answer
    x = 8,397.51

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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.