Home / 7,979.40-11,011.57-4,622.86

Finding the Fourth Proportional to 7,979.40, 11,011.57 and 4,622.86

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Solution

The fourth proportional to 7,979.40, 11,011.57 and 4,622.86 is: 6,379.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,979.40 : 11,011.57 = 4,622.86 : x
  2. Step 2: Convert to fraction form
    7,979.40/11,011.57 = 4,622.86/x
  3. Step 3: Cross multiply
    7,979.40x = 11,011.57 × 4,622.86
  4. Step 4: Simplify right side
    7,979.40x = 50,904,976.57
  5. Step 5: Solve for x
    x = 50,904,976.57/7,979.40
  6. Step 6: Final answer
    x = 6,379.55

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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.