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Finding the Fourth Proportional to 19,953.92, 29,911.71 and 8,862.05

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Solution

The fourth proportional to 19,953.92, 29,911.71 and 8,862.05 is: 13,284.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,953.92 : 29,911.71 = 8,862.05 : x
  2. Step 2: Convert to fraction form
    19,953.92/29,911.71 = 8,862.05/x
  3. Step 3: Cross multiply
    19,953.92x = 29,911.71 × 8,862.05
  4. Step 4: Simplify right side
    19,953.92x = 265,079,069.61
  5. Step 5: Solve for x
    x = 265,079,069.61/19,953.92
  6. Step 6: Final answer
    x = 13,284.56

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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.