Home / 3,946.61-5,446.17-2,178.20

Finding the Fourth Proportional to 3,946.61, 5,446.17 and 2,178.20

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Solution

The fourth proportional to 3,946.61, 5,446.17 and 2,178.20 is: 3,005.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,946.61 : 5,446.17 = 2,178.20 : x
  2. Step 2: Convert to fraction form
    3,946.61/5,446.17 = 2,178.20/x
  3. Step 3: Cross multiply
    3,946.61x = 5,446.17 × 2,178.20
  4. Step 4: Simplify right side
    3,946.61x = 11,862,809.37
  5. Step 5: Solve for x
    x = 11,862,809.37/3,946.61
  6. Step 6: Final answer
    x = 3,005.82

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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.