Home / 11,138.82-15,372.90-6,423

Finding the Fourth Proportional to 11,138.82, 15,372.90 and 6,423

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Solution

The fourth proportional to 11,138.82, 15,372.90 and 6,423 is: 8,864.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,138.82 : 15,372.90 = 6,423 : x
  2. Step 2: Convert to fraction form
    11,138.82/15,372.90 = 6,423/x
  3. Step 3: Cross multiply
    11,138.82x = 15,372.90 × 6,423
  4. Step 4: Simplify right side
    11,138.82x = 98,740,136.70
  5. Step 5: Solve for x
    x = 98,740,136.70/11,138.82
  6. Step 6: Final answer
    x = 8,864.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.