Home / 7,851.24-11,779.32-2,921.28

Finding the Fourth Proportional to 7,851.24, 11,779.32 and 2,921.28

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Solution

The fourth proportional to 7,851.24, 11,779.32 and 2,921.28 is: 4,382.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,851.24 : 11,779.32 = 2,921.28 : x
  2. Step 2: Convert to fraction form
    7,851.24/11,779.32 = 2,921.28/x
  3. Step 3: Cross multiply
    7,851.24x = 11,779.32 × 2,921.28
  4. Step 4: Simplify right side
    7,851.24x = 34,410,691.93
  5. Step 5: Solve for x
    x = 34,410,691.93/7,851.24
  6. Step 6: Final answer
    x = 4,382.84

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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.