Home / 7,877.20-11,815.80-7,723.60

Finding the Fourth Proportional to 7,877.20, 11,815.80 and 7,723.60

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Solution

The fourth proportional to 7,877.20, 11,815.80 and 7,723.60 is: 11,585.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,877.20 : 11,815.80 = 7,723.60 : x
  2. Step 2: Convert to fraction form
    7,877.20/11,815.80 = 7,723.60/x
  3. Step 3: Cross multiply
    7,877.20x = 11,815.80 × 7,723.60
  4. Step 4: Simplify right side
    7,877.20x = 91,260,512.88
  5. Step 5: Solve for x
    x = 91,260,512.88/7,877.20
  6. Step 6: Final answer
    x = 11,585.40

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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.