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Finding the Fourth Proportional to 19,142.79, 28,714.73 and 5,291.79

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Solution

The fourth proportional to 19,142.79, 28,714.73 and 5,291.79 is: 7,937.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,142.79 : 28,714.73 = 5,291.79 : x
  2. Step 2: Convert to fraction form
    19,142.79/28,714.73 = 5,291.79/x
  3. Step 3: Cross multiply
    19,142.79x = 28,714.73 × 5,291.79
  4. Step 4: Simplify right side
    19,142.79x = 151,952,294.61
  5. Step 5: Solve for x
    x = 151,952,294.61/19,142.79
  6. Step 6: Final answer
    x = 7,937.83

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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.