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Finding the Fourth Proportional to 19,143.29, 28,715.48 and 5,292.29

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Solution

The fourth proportional to 19,143.29, 28,715.48 and 5,292.29 is: 7,938.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,143.29 : 28,715.48 = 5,292.29 : x
  2. Step 2: Convert to fraction form
    19,143.29/28,715.48 = 5,292.29/x
  3. Step 3: Cross multiply
    19,143.29x = 28,715.48 × 5,292.29
  4. Step 4: Simplify right side
    19,143.29x = 151,970,621.19
  5. Step 5: Solve for x
    x = 151,970,621.19/19,143.29
  6. Step 6: Final answer
    x = 7,938.58

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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.