Home / 7,140.72-10,712.64-3,447.12

Finding the Fourth Proportional to 7,140.72, 10,712.64 and 3,447.12

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Solution

The fourth proportional to 7,140.72, 10,712.64 and 3,447.12 is: 5,171.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.72 : 10,712.64 = 3,447.12 : x
  2. Step 2: Convert to fraction form
    7,140.72/10,712.64 = 3,447.12/x
  3. Step 3: Cross multiply
    7,140.72x = 10,712.64 × 3,447.12
  4. Step 4: Simplify right side
    7,140.72x = 36,927,755.60
  5. Step 5: Solve for x
    x = 36,927,755.60/7,140.72
  6. Step 6: Final answer
    x = 5,171.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.