Home / 10,455.30-15,704.82-8,815.05

Finding the Fourth Proportional to 10,455.30, 15,704.82 and 8,815.05

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Solution

The fourth proportional to 10,455.30, 15,704.82 and 8,815.05 is: 13,241.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,455.30 : 15,704.82 = 8,815.05 : x
  2. Step 2: Convert to fraction form
    10,455.30/15,704.82 = 8,815.05/x
  3. Step 3: Cross multiply
    10,455.30x = 15,704.82 × 8,815.05
  4. Step 4: Simplify right side
    10,455.30x = 138,438,773.54
  5. Step 5: Solve for x
    x = 138,438,773.54/10,455.30
  6. Step 6: Final answer
    x = 13,241.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.