Home / 2,086.57-3,129.95-1,720.69

Finding the Fourth Proportional to 2,086.57, 3,129.95 and 1,720.69

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Solution

The fourth proportional to 2,086.57, 3,129.95 and 1,720.69 is: 2,581.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.57 : 3,129.95 = 1,720.69 : x
  2. Step 2: Convert to fraction form
    2,086.57/3,129.95 = 1,720.69/x
  3. Step 3: Cross multiply
    2,086.57x = 3,129.95 × 1,720.69
  4. Step 4: Simplify right side
    2,086.57x = 5,385,670.14
  5. Step 5: Solve for x
    x = 5,385,670.14/2,086.57
  6. Step 6: Final answer
    x = 2,581.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.