Home / 7,851.78-11,774.58-3,170.91

Finding the Fourth Proportional to 7,851.78, 11,774.58 and 3,170.91

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Solution

The fourth proportional to 7,851.78, 11,774.58 and 3,170.91 is: 4,755.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,851.78 : 11,774.58 = 3,170.91 : x
  2. Step 2: Convert to fraction form
    7,851.78/11,774.58 = 3,170.91/x
  3. Step 3: Cross multiply
    7,851.78x = 11,774.58 × 3,170.91
  4. Step 4: Simplify right side
    7,851.78x = 37,336,133.47
  5. Step 5: Solve for x
    x = 37,336,133.47/7,851.78
  6. Step 6: Final answer
    x = 4,755.12

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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.