Home / 3,899.32-5,382.60-2,639.76

Finding the Fourth Proportional to 3,899.32, 5,382.60 and 2,639.76

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Solution

The fourth proportional to 3,899.32, 5,382.60 and 2,639.76 is: 3,643.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.32 : 5,382.60 = 2,639.76 : x
  2. Step 2: Convert to fraction form
    3,899.32/5,382.60 = 2,639.76/x
  3. Step 3: Cross multiply
    3,899.32x = 5,382.60 × 2,639.76
  4. Step 4: Simplify right side
    3,899.32x = 14,208,772.18
  5. Step 5: Solve for x
    x = 14,208,772.18/3,899.32
  6. Step 6: Final answer
    x = 3,643.91

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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.