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Finding the Fourth Proportional to 7,313.78, 10,969.70 and 2,931.30

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Solution

The fourth proportional to 7,313.78, 10,969.70 and 2,931.30 is: 4,396.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,313.78 : 10,969.70 = 2,931.30 : x
  2. Step 2: Convert to fraction form
    7,313.78/10,969.70 = 2,931.30/x
  3. Step 3: Cross multiply
    7,313.78x = 10,969.70 × 2,931.30
  4. Step 4: Simplify right side
    7,313.78x = 32,155,481.61
  5. Step 5: Solve for x
    x = 32,155,481.61/7,313.78
  6. Step 6: Final answer
    x = 4,396.56

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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.