Home / 12,115.96-16,720.91-7,401.13

Finding the Fourth Proportional to 12,115.96, 16,720.91 and 7,401.13

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Solution

The fourth proportional to 12,115.96, 16,720.91 and 7,401.13 is: 10,214.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.96 : 16,720.91 = 7,401.13 : x
  2. Step 2: Convert to fraction form
    12,115.96/16,720.91 = 7,401.13/x
  3. Step 3: Cross multiply
    12,115.96x = 16,720.91 × 7,401.13
  4. Step 4: Simplify right side
    12,115.96x = 123,753,628.63
  5. Step 5: Solve for x
    x = 123,753,628.63/12,115.96
  6. Step 6: Final answer
    x = 10,214.10

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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.