Home / 19,122.64-28,684-5,272.72

Finding the Fourth Proportional to 19,122.64, 28,684 and 5,272.72

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Solution

The fourth proportional to 19,122.64, 28,684 and 5,272.72 is: 7,909.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,122.64 : 28,684 = 5,272.72 : x
  2. Step 2: Convert to fraction form
    19,122.64/28,684 = 5,272.72/x
  3. Step 3: Cross multiply
    19,122.64x = 28,684 × 5,272.72
  4. Step 4: Simplify right side
    19,122.64x = 151,242,700.48
  5. Step 5: Solve for x
    x = 151,242,700.48/19,122.64
  6. Step 6: Final answer
    x = 7,909.09

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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.