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Finding the Fourth Proportional to 7,157.05, 9,871.73 and 6,916.21

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Solution

The fourth proportional to 7,157.05, 9,871.73 and 6,916.21 is: 9,539.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,157.05 : 9,871.73 = 6,916.21 : x
  2. Step 2: Convert to fraction form
    7,157.05/9,871.73 = 6,916.21/x
  3. Step 3: Cross multiply
    7,157.05x = 9,871.73 × 6,916.21
  4. Step 4: Simplify right side
    7,157.05x = 68,274,873.80
  5. Step 5: Solve for x
    x = 68,274,873.80/7,157.05
  6. Step 6: Final answer
    x = 9,539.53

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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.