Home / 9,105.80-12,540.66-8,437.64

Finding the Fourth Proportional to 9,105.80, 12,540.66 and 8,437.64

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Solution

The fourth proportional to 9,105.80, 12,540.66 and 8,437.64 is: 11,620.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,105.80 : 12,540.66 = 8,437.64 : x
  2. Step 2: Convert to fraction form
    9,105.80/12,540.66 = 8,437.64/x
  3. Step 3: Cross multiply
    9,105.80x = 12,540.66 × 8,437.64
  4. Step 4: Simplify right side
    9,105.80x = 105,813,574.44
  5. Step 5: Solve for x
    x = 105,813,574.44/9,105.80
  6. Step 6: Final answer
    x = 11,620.46

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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.