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Finding the Fourth Proportional to 5,156.54, 7,115.97 and 2,918.40

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Solution

The fourth proportional to 5,156.54, 7,115.97 and 2,918.40 is: 4,027.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.54 : 7,115.97 = 2,918.40 : x
  2. Step 2: Convert to fraction form
    5,156.54/7,115.97 = 2,918.40/x
  3. Step 3: Cross multiply
    5,156.54x = 7,115.97 × 2,918.40
  4. Step 4: Simplify right side
    5,156.54x = 20,767,231.11
  5. Step 5: Solve for x
    x = 20,767,231.11/5,156.54
  6. Step 6: Final answer
    x = 4,027.36

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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.