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Finding the Fourth Proportional to 15,082.29, 20,813.49 and 8,368.65

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Solution

The fourth proportional to 15,082.29, 20,813.49 and 8,368.65 is: 11,548.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,082.29 : 20,813.49 = 8,368.65 : x
  2. Step 2: Convert to fraction form
    15,082.29/20,813.49 = 8,368.65/x
  3. Step 3: Cross multiply
    15,082.29x = 20,813.49 × 8,368.65
  4. Step 4: Simplify right side
    15,082.29x = 174,180,813.09
  5. Step 5: Solve for x
    x = 174,180,813.09/15,082.29
  6. Step 6: Final answer
    x = 11,548.70

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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.