Home / 11,387.45-15,704.44-7,138.94

Finding the Fourth Proportional to 11,387.45, 15,704.44 and 7,138.94

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Solution

The fourth proportional to 11,387.45, 15,704.44 and 7,138.94 is: 9,845.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,387.45 : 15,704.44 = 7,138.94 : x
  2. Step 2: Convert to fraction form
    11,387.45/15,704.44 = 7,138.94/x
  3. Step 3: Cross multiply
    11,387.45x = 15,704.44 × 7,138.94
  4. Step 4: Simplify right side
    11,387.45x = 112,113,054.89
  5. Step 5: Solve for x
    x = 112,113,054.89/11,387.45
  6. Step 6: Final answer
    x = 9,845.32

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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.