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Finding the Fourth Proportional to 7,969.70, 10,975.21 and 7,945.40

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Solution

The fourth proportional to 7,969.70, 10,975.21 and 7,945.40 is: 10,941.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,969.70 : 10,975.21 = 7,945.40 : x
  2. Step 2: Convert to fraction form
    7,969.70/10,975.21 = 7,945.40/x
  3. Step 3: Cross multiply
    7,969.70x = 10,975.21 × 7,945.40
  4. Step 4: Simplify right side
    7,969.70x = 87,202,358.79
  5. Step 5: Solve for x
    x = 87,202,358.79/7,969.70
  6. Step 6: Final answer
    x = 10,941.74

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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.