Home / 4,987.20-6,879.52-3,120.96

Finding the Fourth Proportional to 4,987.20, 6,879.52 and 3,120.96

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Solution

The fourth proportional to 4,987.20, 6,879.52 and 3,120.96 is: 4,305.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.20 : 6,879.52 = 3,120.96 : x
  2. Step 2: Convert to fraction form
    4,987.20/6,879.52 = 3,120.96/x
  3. Step 3: Cross multiply
    4,987.20x = 6,879.52 × 3,120.96
  4. Step 4: Simplify right side
    4,987.20x = 21,470,706.74
  5. Step 5: Solve for x
    x = 21,470,706.74/4,987.20
  6. Step 6: Final answer
    x = 4,305.16

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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.