Home / 3,139.81-4,332.83-2,020.79

Finding the Fourth Proportional to 3,139.81, 4,332.83 and 2,020.79

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Solution

The fourth proportional to 3,139.81, 4,332.83 and 2,020.79 is: 2,788.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.81 : 4,332.83 = 2,020.79 : x
  2. Step 2: Convert to fraction form
    3,139.81/4,332.83 = 2,020.79/x
  3. Step 3: Cross multiply
    3,139.81x = 4,332.83 × 2,020.79
  4. Step 4: Simplify right side
    3,139.81x = 8,755,740.26
  5. Step 5: Solve for x
    x = 8,755,740.26/3,139.81
  6. Step 6: Final answer
    x = 2,788.62

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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.