Home / 7,877.72-11,815.86-2,405.72

Finding the Fourth Proportional to 7,877.72, 11,815.86 and 2,405.72

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Solution

The fourth proportional to 7,877.72, 11,815.86 and 2,405.72 is: 3,608.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,877.72 : 11,815.86 = 2,405.72 : x
  2. Step 2: Convert to fraction form
    7,877.72/11,815.86 = 2,405.72/x
  3. Step 3: Cross multiply
    7,877.72x = 11,815.86 × 2,405.72
  4. Step 4: Simplify right side
    7,877.72x = 28,425,650.72
  5. Step 5: Solve for x
    x = 28,425,650.72/7,877.72
  6. Step 6: Final answer
    x = 3,608.36

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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.