Home / 3,938.70-5,430.88-2,942.29

Finding the Fourth Proportional to 3,938.70, 5,430.88 and 2,942.29

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Solution

The fourth proportional to 3,938.70, 5,430.88 and 2,942.29 is: 4,056.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.70 : 5,430.88 = 2,942.29 : x
  2. Step 2: Convert to fraction form
    3,938.70/5,430.88 = 2,942.29/x
  3. Step 3: Cross multiply
    3,938.70x = 5,430.88 × 2,942.29
  4. Step 4: Simplify right side
    3,938.70x = 15,979,223.92
  5. Step 5: Solve for x
    x = 15,979,223.92/3,938.70
  6. Step 6: Final answer
    x = 4,056.98

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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.