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Finding the Fourth Proportional to 7,173.96, 9,903.40 and 4,787.90

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Solution

The fourth proportional to 7,173.96, 9,903.40 and 4,787.90 is: 6,609.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,173.96 : 9,903.40 = 4,787.90 : x
  2. Step 2: Convert to fraction form
    7,173.96/9,903.40 = 4,787.90/x
  3. Step 3: Cross multiply
    7,173.96x = 9,903.40 × 4,787.90
  4. Step 4: Simplify right side
    7,173.96x = 47,416,488.86
  5. Step 5: Solve for x
    x = 47,416,488.86/7,173.96
  6. Step 6: Final answer
    x = 6,609.53

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Why These Related Problems?

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