Home / 19,138.64-28,709.44-5,287.64

Finding the Fourth Proportional to 19,138.64, 28,709.44 and 5,287.64

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Solution

The fourth proportional to 19,138.64, 28,709.44 and 5,287.64 is: 7,931.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,138.64 : 28,709.44 = 5,287.64 : x
  2. Step 2: Convert to fraction form
    19,138.64/28,709.44 = 5,287.64/x
  3. Step 3: Cross multiply
    19,138.64x = 28,709.44 × 5,287.64
  4. Step 4: Simplify right side
    19,138.64x = 151,805,183.32
  5. Step 5: Solve for x
    x = 151,805,183.32/19,138.64
  6. Step 6: Final answer
    x = 7,931.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.