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Finding the Fourth Proportional to 5,155.49, 7,115.63 and 2,917.46

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Solution

The fourth proportional to 5,155.49, 7,115.63 and 2,917.46 is: 4,026.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,155.49 : 7,115.63 = 2,917.46 : x
  2. Step 2: Convert to fraction form
    5,155.49/7,115.63 = 2,917.46/x
  3. Step 3: Cross multiply
    5,155.49x = 7,115.63 × 2,917.46
  4. Step 4: Simplify right side
    5,155.49x = 20,759,515.73
  5. Step 5: Solve for x
    x = 20,759,515.73/5,155.49
  6. Step 6: Final answer
    x = 4,026.69

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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.