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Finding the Fourth Proportional to 7,143.98, 9,849.50 and 4,621.64

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Solution

The fourth proportional to 7,143.98, 9,849.50 and 4,621.64 is: 6,371.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.98 : 9,849.50 = 4,621.64 : x
  2. Step 2: Convert to fraction form
    7,143.98/9,849.50 = 4,621.64/x
  3. Step 3: Cross multiply
    7,143.98x = 9,849.50 × 4,621.64
  4. Step 4: Simplify right side
    7,143.98x = 45,520,843.18
  5. Step 5: Solve for x
    x = 45,520,843.18/7,143.98
  6. Step 6: Final answer
    x = 6,371.92

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1.5x scale

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.