Home / 5,383.90-7,429.80-3,145.87

Finding the Fourth Proportional to 5,383.90, 7,429.80 and 3,145.87

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Solution

The fourth proportional to 5,383.90, 7,429.80 and 3,145.87 is: 4,341.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,383.90 : 7,429.80 = 3,145.87 : x
  2. Step 2: Convert to fraction form
    5,383.90/7,429.80 = 3,145.87/x
  3. Step 3: Cross multiply
    5,383.90x = 7,429.80 × 3,145.87
  4. Step 4: Simplify right side
    5,383.90x = 23,373,184.93
  5. Step 5: Solve for x
    x = 23,373,184.93/5,383.90
  6. Step 6: Final answer
    x = 4,341.31

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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.