Home / 7,921.58-11,878.86-4,223.12

Finding the Fourth Proportional to 7,921.58, 11,878.86 and 4,223.12

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Solution

The fourth proportional to 7,921.58, 11,878.86 and 4,223.12 is: 6,332.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.58 : 11,878.86 = 4,223.12 : x
  2. Step 2: Convert to fraction form
    7,921.58/11,878.86 = 4,223.12/x
  3. Step 3: Cross multiply
    7,921.58x = 11,878.86 × 4,223.12
  4. Step 4: Simplify right side
    7,921.58x = 50,165,851.24
  5. Step 5: Solve for x
    x = 50,165,851.24/7,921.58
  6. Step 6: Final answer
    x = 6,332.81

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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.