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Finding the Fourth Proportional to 19,080, 28,620.54 and 5,229

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Solution

The fourth proportional to 19,080, 28,620.54 and 5,229 is: 7,843.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,080 : 28,620.54 = 5,229 : x
  2. Step 2: Convert to fraction form
    19,080/28,620.54 = 5,229/x
  3. Step 3: Cross multiply
    19,080x = 28,620.54 × 5,229
  4. Step 4: Simplify right side
    19,080x = 149,656,803.66
  5. Step 5: Solve for x
    x = 149,656,803.66/19,080
  6. Step 6: Final answer
    x = 7,843.65

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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.