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Finding the Fourth Proportional to 7,139.36, 9,850.94 and 4,621.12

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Solution

The fourth proportional to 7,139.36, 9,850.94 and 4,621.12 is: 6,376.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.36 : 9,850.94 = 4,621.12 : x
  2. Step 2: Convert to fraction form
    7,139.36/9,850.94 = 4,621.12/x
  3. Step 3: Cross multiply
    7,139.36x = 9,850.94 × 4,621.12
  4. Step 4: Simplify right side
    7,139.36x = 45,522,358.45
  5. Step 5: Solve for x
    x = 45,522,358.45/7,139.36
  6. Step 6: Final answer
    x = 6,376.25

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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.