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Finding the Fourth Proportional to 7,143.59, 10,715.48 and 2,213.21

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Solution

The fourth proportional to 7,143.59, 10,715.48 and 2,213.21 is: 3,319.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.59 : 10,715.48 = 2,213.21 : x
  2. Step 2: Convert to fraction form
    7,143.59/10,715.48 = 2,213.21/x
  3. Step 3: Cross multiply
    7,143.59x = 10,715.48 × 2,213.21
  4. Step 4: Simplify right side
    7,143.59x = 23,715,607.49
  5. Step 5: Solve for x
    x = 23,715,607.49/7,143.59
  6. Step 6: Final answer
    x = 3,319.84

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1.5x scale

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.