Home / 7,853.20-11,779.40-2,659.12

Finding the Fourth Proportional to 7,853.20, 11,779.40 and 2,659.12

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Solution

The fourth proportional to 7,853.20, 11,779.40 and 2,659.12 is: 3,988.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,853.20 : 11,779.40 = 2,659.12 : x
  2. Step 2: Convert to fraction form
    7,853.20/11,779.40 = 2,659.12/x
  3. Step 3: Cross multiply
    7,853.20x = 11,779.40 × 2,659.12
  4. Step 4: Simplify right side
    7,853.20x = 31,322,838.13
  5. Step 5: Solve for x
    x = 31,322,838.13/7,853.20
  6. Step 6: Final answer
    x = 3,988.54

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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.