Home / 5,385.20-7,430.90-3,145.44

Finding the Fourth Proportional to 5,385.20, 7,430.90 and 3,145.44

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Solution

The fourth proportional to 5,385.20, 7,430.90 and 3,145.44 is: 4,340.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.20 : 7,430.90 = 3,145.44 : x
  2. Step 2: Convert to fraction form
    5,385.20/7,430.90 = 3,145.44/x
  3. Step 3: Cross multiply
    5,385.20x = 7,430.90 × 3,145.44
  4. Step 4: Simplify right side
    5,385.20x = 23,373,434.37
  5. Step 5: Solve for x
    x = 23,373,434.37/5,385.20
  6. Step 6: Final answer
    x = 4,340.31

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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.