Home / 6,439.29-8,886.57-3,921

Finding the Fourth Proportional to 6,439.29, 8,886.57 and 3,921

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Solution

The fourth proportional to 6,439.29, 8,886.57 and 3,921 is: 5,411.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,439.29 : 8,886.57 = 3,921 : x
  2. Step 2: Convert to fraction form
    6,439.29/8,886.57 = 3,921/x
  3. Step 3: Cross multiply
    6,439.29x = 8,886.57 × 3,921
  4. Step 4: Simplify right side
    6,439.29x = 34,844,240.97
  5. Step 5: Solve for x
    x = 34,844,240.97/6,439.29
  6. Step 6: Final answer
    x = 5,411.19

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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.