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Finding the Fourth Proportional to 20,607.19, 30,916.86 and 7,101.79

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Solution

The fourth proportional to 20,607.19, 30,916.86 and 7,101.79 is: 10,654.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,607.19 : 30,916.86 = 7,101.79 : x
  2. Step 2: Convert to fraction form
    20,607.19/30,916.86 = 7,101.79/x
  3. Step 3: Cross multiply
    20,607.19x = 30,916.86 × 7,101.79
  4. Step 4: Simplify right side
    20,607.19x = 219,565,047.18
  5. Step 5: Solve for x
    x = 219,565,047.18/20,607.19
  6. Step 6: Final answer
    x = 10,654.78

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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.