Home / 9,979.20-13,766.40-6,445.44

Finding the Fourth Proportional to 9,979.20, 13,766.40 and 6,445.44

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Solution

The fourth proportional to 9,979.20, 13,766.40 and 6,445.44 is: 8,891.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,979.20 : 13,766.40 = 6,445.44 : x
  2. Step 2: Convert to fraction form
    9,979.20/13,766.40 = 6,445.44/x
  3. Step 3: Cross multiply
    9,979.20x = 13,766.40 × 6,445.44
  4. Step 4: Simplify right side
    9,979.20x = 88,730,505.22
  5. Step 5: Solve for x
    x = 88,730,505.22/9,979.20
  6. Step 6: Final answer
    x = 8,891.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.