Home / 3,869.76-5,342.98-3,418.18

Finding the Fourth Proportional to 3,869.76, 5,342.98 and 3,418.18

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Solution

The fourth proportional to 3,869.76, 5,342.98 and 3,418.18 is: 4,719.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.76 : 5,342.98 = 3,418.18 : x
  2. Step 2: Convert to fraction form
    3,869.76/5,342.98 = 3,418.18/x
  3. Step 3: Cross multiply
    3,869.76x = 5,342.98 × 3,418.18
  4. Step 4: Simplify right side
    3,869.76x = 18,263,267.38
  5. Step 5: Solve for x
    x = 18,263,267.38/3,869.76
  6. Step 6: Final answer
    x = 4,719.48

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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.