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Finding the Fourth Proportional to 7,857.58, 11,779.08 and 2,659.82

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Solution

The fourth proportional to 7,857.58, 11,779.08 and 2,659.82 is: 3,987.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,857.58 : 11,779.08 = 2,659.82 : x
  2. Step 2: Convert to fraction form
    7,857.58/11,779.08 = 2,659.82/x
  3. Step 3: Cross multiply
    7,857.58x = 11,779.08 × 2,659.82
  4. Step 4: Simplify right side
    7,857.58x = 31,330,232.57
  5. Step 5: Solve for x
    x = 31,330,232.57/7,857.58
  6. Step 6: Final answer
    x = 3,987.26

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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.