Home / 7,140.20-9,840.12-5,147.36

Finding the Fourth Proportional to 7,140.20, 9,840.12 and 5,147.36

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Solution

The fourth proportional to 7,140.20, 9,840.12 and 5,147.36 is: 7,093.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.20 : 9,840.12 = 5,147.36 : x
  2. Step 2: Convert to fraction form
    7,140.20/9,840.12 = 5,147.36/x
  3. Step 3: Cross multiply
    7,140.20x = 9,840.12 × 5,147.36
  4. Step 4: Simplify right side
    7,140.20x = 50,650,640.08
  5. Step 5: Solve for x
    x = 50,650,640.08/7,140.20
  6. Step 6: Final answer
    x = 7,093.73

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Half scale
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Double scale
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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.