Home / 11,361.30-15,677.55-8,378.78

Finding the Fourth Proportional to 11,361.30, 15,677.55 and 8,378.78

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Solution

The fourth proportional to 11,361.30, 15,677.55 and 8,378.78 is: 11,561.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,361.30 : 15,677.55 = 8,378.78 : x
  2. Step 2: Convert to fraction form
    11,361.30/15,677.55 = 8,378.78/x
  3. Step 3: Cross multiply
    11,361.30x = 15,677.55 × 8,378.78
  4. Step 4: Simplify right side
    11,361.30x = 131,358,664.00
  5. Step 5: Solve for x
    x = 131,358,664.00/11,361.30
  6. Step 6: Final answer
    x = 11,561.94

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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.