Home / 3,126.81-4,314.99-1,800.78

Finding the Fourth Proportional to 3,126.81, 4,314.99 and 1,800.78

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Solution

The fourth proportional to 3,126.81, 4,314.99 and 1,800.78 is: 2,485.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.81 : 4,314.99 = 1,800.78 : x
  2. Step 2: Convert to fraction form
    3,126.81/4,314.99 = 1,800.78/x
  3. Step 3: Cross multiply
    3,126.81x = 4,314.99 × 1,800.78
  4. Step 4: Simplify right side
    3,126.81x = 7,770,347.69
  5. Step 5: Solve for x
    x = 7,770,347.69/3,126.81
  6. Step 6: Final answer
    x = 2,485.07

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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.