Home / 13,438.91-20,127.62-6,423.86

Finding the Fourth Proportional to 13,438.91, 20,127.62 and 6,423.86

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Solution

The fourth proportional to 13,438.91, 20,127.62 and 6,423.86 is: 9,621.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.91 : 20,127.62 = 6,423.86 : x
  2. Step 2: Convert to fraction form
    13,438.91/20,127.62 = 6,423.86/x
  3. Step 3: Cross multiply
    13,438.91x = 20,127.62 × 6,423.86
  4. Step 4: Simplify right side
    13,438.91x = 129,296,880.26
  5. Step 5: Solve for x
    x = 129,296,880.26/13,438.91
  6. Step 6: Final answer
    x = 9,621.09

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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.