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Finding the Fourth Proportional to 5,166.32, 7,129.22 and 2,928.15

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Solution

The fourth proportional to 5,166.32, 7,129.22 and 2,928.15 is: 4,040.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,166.32 : 7,129.22 = 2,928.15 : x
  2. Step 2: Convert to fraction form
    5,166.32/7,129.22 = 2,928.15/x
  3. Step 3: Cross multiply
    5,166.32x = 7,129.22 × 2,928.15
  4. Step 4: Simplify right side
    5,166.32x = 20,875,410.90
  5. Step 5: Solve for x
    x = 20,875,410.90/5,166.32
  6. Step 6: Final answer
    x = 4,040.68

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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.