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Finding the Fourth Proportional to 20,607, 30,903.15 and 8,913.84

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Solution

The fourth proportional to 20,607, 30,903.15 and 8,913.84 is: 13,367.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,607 : 30,903.15 = 8,913.84 : x
  2. Step 2: Convert to fraction form
    20,607/30,903.15 = 8,913.84/x
  3. Step 3: Cross multiply
    20,607x = 30,903.15 × 8,913.84
  4. Step 4: Simplify right side
    20,607x = 275,465,734.60
  5. Step 5: Solve for x
    x = 275,465,734.60/20,607
  6. Step 6: Final answer
    x = 13,367.58

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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.