Home / 15,486.35-21,371.55-8,771.87

Finding the Fourth Proportional to 15,486.35, 21,371.55 and 8,771.87

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Solution

The fourth proportional to 15,486.35, 21,371.55 and 8,771.87 is: 12,105.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.35 : 21,371.55 = 8,771.87 : x
  2. Step 2: Convert to fraction form
    15,486.35/21,371.55 = 8,771.87/x
  3. Step 3: Cross multiply
    15,486.35x = 21,371.55 × 8,771.87
  4. Step 4: Simplify right side
    15,486.35x = 187,468,351.44
  5. Step 5: Solve for x
    x = 187,468,351.44/15,486.35
  6. Step 6: Final answer
    x = 12,105.40

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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.