Home / 8,288.06-12,379.35-7,121.45

Finding the Fourth Proportional to 8,288.06, 12,379.35 and 7,121.45

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Solution

The fourth proportional to 8,288.06, 12,379.35 and 7,121.45 is: 10,636.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,288.06 : 12,379.35 = 7,121.45 : x
  2. Step 2: Convert to fraction form
    8,288.06/12,379.35 = 7,121.45/x
  3. Step 3: Cross multiply
    8,288.06x = 12,379.35 × 7,121.45
  4. Step 4: Simplify right side
    8,288.06x = 88,158,860.16
  5. Step 5: Solve for x
    x = 88,158,860.16/8,288.06
  6. Step 6: Final answer
    x = 10,636.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.