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Finding the Fourth Proportional to 19,145.29, 28,718.48 and 5,294.29

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Solution

The fourth proportional to 19,145.29, 28,718.48 and 5,294.29 is: 7,941.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,145.29 : 28,718.48 = 5,294.29 : x
  2. Step 2: Convert to fraction form
    19,145.29/28,718.48 = 5,294.29/x
  3. Step 3: Cross multiply
    19,145.29x = 28,718.48 × 5,294.29
  4. Step 4: Simplify right side
    19,145.29x = 152,043,961.48
  5. Step 5: Solve for x
    x = 152,043,961.48/19,145.29
  6. Step 6: Final answer
    x = 7,941.59

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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.