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Finding the Fourth Proportional to 30,689.34, 42,351.35 and 17,260.62

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Solution

The fourth proportional to 30,689.34, 42,351.35 and 17,260.62 is: 23,819.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,689.34 : 42,351.35 = 17,260.62 : x
  2. Step 2: Convert to fraction form
    30,689.34/42,351.35 = 17,260.62/x
  3. Step 3: Cross multiply
    30,689.34x = 42,351.35 × 17,260.62
  4. Step 4: Simplify right side
    30,689.34x = 731,010,472.53
  5. Step 5: Solve for x
    x = 731,010,472.53/30,689.34
  6. Step 6: Final answer
    x = 23,819.69

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.