Home / 13,438.91-20,158.27-3,578.99

Finding the Fourth Proportional to 13,438.91, 20,158.27 and 3,578.99

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Solution

The fourth proportional to 13,438.91, 20,158.27 and 3,578.99 is: 5,368.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.91 : 20,158.27 = 3,578.99 : x
  2. Step 2: Convert to fraction form
    13,438.91/20,158.27 = 3,578.99/x
  3. Step 3: Cross multiply
    13,438.91x = 20,158.27 × 3,578.99
  4. Step 4: Simplify right side
    13,438.91x = 72,146,137.01
  5. Step 5: Solve for x
    x = 72,146,137.01/13,438.91
  6. Step 6: Final answer
    x = 5,368.45

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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.