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Finding the Fourth Proportional to 7,769.72, 10,737.42 and 6,905.72

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Solution

The fourth proportional to 7,769.72, 10,737.42 and 6,905.72 is: 9,543.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,769.72 : 10,737.42 = 6,905.72 : x
  2. Step 2: Convert to fraction form
    7,769.72/10,737.42 = 6,905.72/x
  3. Step 3: Cross multiply
    7,769.72x = 10,737.42 × 6,905.72
  4. Step 4: Simplify right side
    7,769.72x = 74,149,616.04
  5. Step 5: Solve for x
    x = 74,149,616.04/7,769.72
  6. Step 6: Final answer
    x = 9,543.41

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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.