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Finding the Fourth Proportional to 28,369.87, 42,510.89 and 19,489.46

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Solution

The fourth proportional to 28,369.87, 42,510.89 and 19,489.46 is: 29,204.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,369.87 : 42,510.89 = 19,489.46 : x
  2. Step 2: Convert to fraction form
    28,369.87/42,510.89 = 19,489.46/x
  3. Step 3: Cross multiply
    28,369.87x = 42,510.89 × 19,489.46
  4. Step 4: Simplify right side
    28,369.87x = 828,514,126.39
  5. Step 5: Solve for x
    x = 828,514,126.39/28,369.87
  6. Step 6: Final answer
    x = 29,204.02

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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.