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Finding the Fourth Proportional to 20,901, 31,465.52 and 19,063.92

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Solution

The fourth proportional to 20,901, 31,465.52 and 19,063.92 is: 28,699.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901 : 31,465.52 = 19,063.92 : x
  2. Step 2: Convert to fraction form
    20,901/31,465.52 = 19,063.92/x
  3. Step 3: Cross multiply
    20,901x = 31,465.52 × 19,063.92
  4. Step 4: Simplify right side
    20,901x = 599,856,156.04
  5. Step 5: Solve for x
    x = 599,856,156.04/20,901
  6. Step 6: Final answer
    x = 28,699.88

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.