Home / 13,438.92-20,158.02-3,578.28

Finding the Fourth Proportional to 13,438.92, 20,158.02 and 3,578.28

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Solution

The fourth proportional to 13,438.92, 20,158.02 and 3,578.28 is: 5,367.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.92 : 20,158.02 = 3,578.28 : x
  2. Step 2: Convert to fraction form
    13,438.92/20,158.02 = 3,578.28/x
  3. Step 3: Cross multiply
    13,438.92x = 20,158.02 × 3,578.28
  4. Step 4: Simplify right side
    13,438.92x = 72,131,039.81
  5. Step 5: Solve for x
    x = 72,131,039.81/13,438.92
  6. Step 6: Final answer
    x = 5,367.32

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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.