Home / 3,129.55-4,319.35-2,011.88

Finding the Fourth Proportional to 3,129.55, 4,319.35 and 2,011.88

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Solution

The fourth proportional to 3,129.55, 4,319.35 and 2,011.88 is: 2,776.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.55 : 4,319.35 = 2,011.88 : x
  2. Step 2: Convert to fraction form
    3,129.55/4,319.35 = 2,011.88/x
  3. Step 3: Cross multiply
    3,129.55x = 4,319.35 × 2,011.88
  4. Step 4: Simplify right side
    3,129.55x = 8,690,019.65
  5. Step 5: Solve for x
    x = 8,690,019.65/3,129.55
  6. Step 6: Final answer
    x = 2,776.77

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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.