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Finding the Fourth Proportional to 7,401.16, 11,103.90 and 4,321

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Solution

The fourth proportional to 7,401.16, 11,103.90 and 4,321 is: 6,482.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,401.16 : 11,103.90 = 4,321 : x
  2. Step 2: Convert to fraction form
    7,401.16/11,103.90 = 4,321/x
  3. Step 3: Cross multiply
    7,401.16x = 11,103.90 × 4,321
  4. Step 4: Simplify right side
    7,401.16x = 47,979,951.90
  5. Step 5: Solve for x
    x = 47,979,951.90/7,401.16
  6. Step 6: Final answer
    x = 6,482.76

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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.