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Finding the Fourth Proportional to 5,166.16, 7,129.54 and 2,928.12

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Solution

The fourth proportional to 5,166.16, 7,129.54 and 2,928.12 is: 4,040.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,166.16 : 7,129.54 = 2,928.12 : x
  2. Step 2: Convert to fraction form
    5,166.16/7,129.54 = 2,928.12/x
  3. Step 3: Cross multiply
    5,166.16x = 7,129.54 × 2,928.12
  4. Step 4: Simplify right side
    5,166.16x = 20,876,148.66
  5. Step 5: Solve for x
    x = 20,876,148.66/5,166.16
  6. Step 6: Final answer
    x = 4,040.94

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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.