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Finding the Fourth Proportional to 5,179.56, 7,155.03 and 4,987.56

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Solution

The fourth proportional to 5,179.56, 7,155.03 and 4,987.56 is: 6,889.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.56 : 7,155.03 = 4,987.56 : x
  2. Step 2: Convert to fraction form
    5,179.56/7,155.03 = 4,987.56/x
  3. Step 3: Cross multiply
    5,179.56x = 7,155.03 × 4,987.56
  4. Step 4: Simplify right side
    5,179.56x = 35,686,141.43
  5. Step 5: Solve for x
    x = 35,686,141.43/5,179.56
  6. Step 6: Final answer
    x = 6,889.80

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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.