Home / 15,513.32-21,408.82-8,440.20

Finding the Fourth Proportional to 15,513.32, 21,408.82 and 8,440.20

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Solution

The fourth proportional to 15,513.32, 21,408.82 and 8,440.20 is: 11,647.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.32 : 21,408.82 = 8,440.20 : x
  2. Step 2: Convert to fraction form
    15,513.32/21,408.82 = 8,440.20/x
  3. Step 3: Cross multiply
    15,513.32x = 21,408.82 × 8,440.20
  4. Step 4: Simplify right side
    15,513.32x = 180,694,722.56
  5. Step 5: Solve for x
    x = 180,694,722.56/15,513.32
  6. Step 6: Final answer
    x = 11,647.71

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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.