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Finding the Fourth Proportional to 7,313.72, 10,971.72 and 3,154.91

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Solution

The fourth proportional to 7,313.72, 10,971.72 and 3,154.91 is: 4,732.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,313.72 : 10,971.72 = 3,154.91 : x
  2. Step 2: Convert to fraction form
    7,313.72/10,971.72 = 3,154.91/x
  3. Step 3: Cross multiply
    7,313.72x = 10,971.72 × 3,154.91
  4. Step 4: Simplify right side
    7,313.72x = 34,614,734.29
  5. Step 5: Solve for x
    x = 34,614,734.29/7,313.72
  6. Step 6: Final answer
    x = 4,732.85

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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.