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Finding the Fourth Proportional to 15,082.85, 20,814.19 and 8,368.31

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Solution

The fourth proportional to 15,082.85, 20,814.19 and 8,368.31 is: 11,548.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,082.85 : 20,814.19 = 8,368.31 : x
  2. Step 2: Convert to fraction form
    15,082.85/20,814.19 = 8,368.31/x
  3. Step 3: Cross multiply
    15,082.85x = 20,814.19 × 8,368.31
  4. Step 4: Simplify right side
    15,082.85x = 174,179,625.43
  5. Step 5: Solve for x
    x = 174,179,625.43/15,082.85
  6. Step 6: Final answer
    x = 11,548.19

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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.