Home / 5,385.21-7,429.10-3,147.18

Finding the Fourth Proportional to 5,385.21, 7,429.10 and 3,147.18

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Solution

The fourth proportional to 5,385.21, 7,429.10 and 3,147.18 is: 4,341.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.21 : 7,429.10 = 3,147.18 : x
  2. Step 2: Convert to fraction form
    5,385.21/7,429.10 = 3,147.18/x
  3. Step 3: Cross multiply
    5,385.21x = 7,429.10 × 3,147.18
  4. Step 4: Simplify right side
    5,385.21x = 23,380,699.20
  5. Step 5: Solve for x
    x = 23,380,699.20/5,385.21
  6. Step 6: Final answer
    x = 4,341.65

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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.