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Finding the Fourth Proportional to 8,139.80, 11,082.08 and 8,114.60

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Solution

The fourth proportional to 8,139.80, 11,082.08 and 8,114.60 is: 11,047.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.80 : 11,082.08 = 8,114.60 : x
  2. Step 2: Convert to fraction form
    8,139.80/11,082.08 = 8,114.60/x
  3. Step 3: Cross multiply
    8,139.80x = 11,082.08 × 8,114.60
  4. Step 4: Simplify right side
    8,139.80x = 89,926,646.37
  5. Step 5: Solve for x
    x = 89,926,646.37/8,139.80
  6. Step 6: Final answer
    x = 11,047.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.