Home / 3,947.13-5,446.58-2,178.63

Finding the Fourth Proportional to 3,947.13, 5,446.58 and 2,178.63

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Solution

The fourth proportional to 3,947.13, 5,446.58 and 2,178.63 is: 3,006.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.13 : 5,446.58 = 2,178.63 : x
  2. Step 2: Convert to fraction form
    3,947.13/5,446.58 = 2,178.63/x
  3. Step 3: Cross multiply
    3,947.13x = 5,446.58 × 2,178.63
  4. Step 4: Simplify right side
    3,947.13x = 11,866,071.69
  5. Step 5: Solve for x
    x = 11,866,071.69/3,947.13
  6. Step 6: Final answer
    x = 3,006.25

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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.