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Finding the Fourth Proportional to 15,082.87, 20,813.65 and 8,369.01

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Solution

The fourth proportional to 15,082.87, 20,813.65 and 8,369.01 is: 11,548.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,082.87 : 20,813.65 = 8,369.01 : x
  2. Step 2: Convert to fraction form
    15,082.87/20,813.65 = 8,369.01/x
  3. Step 3: Cross multiply
    15,082.87x = 20,813.65 × 8,369.01
  4. Step 4: Simplify right side
    15,082.87x = 174,189,644.99
  5. Step 5: Solve for x
    x = 174,189,644.99/15,082.87
  6. Step 6: Final answer
    x = 11,548.84

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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.