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Finding the Fourth Proportional to 15,082.86, 20,815.04 and 8,368.10

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Solution

The fourth proportional to 15,082.86, 20,815.04 and 8,368.10 is: 11,548.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,082.86 : 20,815.04 = 8,368.10 : x
  2. Step 2: Convert to fraction form
    15,082.86/20,815.04 = 8,368.10/x
  3. Step 3: Cross multiply
    15,082.86x = 20,815.04 × 8,368.10
  4. Step 4: Simplify right side
    15,082.86x = 174,182,336.22
  5. Step 5: Solve for x
    x = 174,182,336.22/15,082.86
  6. Step 6: Final answer
    x = 11,548.36

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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.