Home / 12,720.42-19,086.12-6,881.13

Finding the Fourth Proportional to 12,720.42, 19,086.12 and 6,881.13

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Solution

The fourth proportional to 12,720.42, 19,086.12 and 6,881.13 is: 10,324.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.42 : 19,086.12 = 6,881.13 : x
  2. Step 2: Convert to fraction form
    12,720.42/19,086.12 = 6,881.13/x
  3. Step 3: Cross multiply
    12,720.42x = 19,086.12 × 6,881.13
  4. Step 4: Simplify right side
    12,720.42x = 131,334,072.92
  5. Step 5: Solve for x
    x = 131,334,072.92/12,720.42
  6. Step 6: Final answer
    x = 10,324.66

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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.