Home / 12,639.05-18,944.15-7,697.75

Finding the Fourth Proportional to 12,639.05, 18,944.15 and 7,697.75

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Solution

The fourth proportional to 12,639.05, 18,944.15 and 7,697.75 is: 11,537.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.05 : 18,944.15 = 7,697.75 : x
  2. Step 2: Convert to fraction form
    12,639.05/18,944.15 = 7,697.75/x
  3. Step 3: Cross multiply
    12,639.05x = 18,944.15 × 7,697.75
  4. Step 4: Simplify right side
    12,639.05x = 145,827,197.45
  5. Step 5: Solve for x
    x = 145,827,197.45/12,639.05
  6. Step 6: Final answer
    x = 11,537.83

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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.