Home / 5,385.12-7,431.36-3,148.32

Finding the Fourth Proportional to 5,385.12, 7,431.36 and 3,148.32

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Solution

The fourth proportional to 5,385.12, 7,431.36 and 3,148.32 is: 4,344.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.12 : 7,431.36 = 3,148.32 : x
  2. Step 2: Convert to fraction form
    5,385.12/7,431.36 = 3,148.32/x
  3. Step 3: Cross multiply
    5,385.12x = 7,431.36 × 3,148.32
  4. Step 4: Simplify right side
    5,385.12x = 23,396,299.32
  5. Step 5: Solve for x
    x = 23,396,299.32/5,385.12
  6. Step 6: Final answer
    x = 4,344.62

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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.