Home / 8,639.48-12,958.81-2,399.45

Finding the Fourth Proportional to 8,639.48, 12,958.81 and 2,399.45

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Solution

The fourth proportional to 8,639.48, 12,958.81 and 2,399.45 is: 3,599.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.48 : 12,958.81 = 2,399.45 : x
  2. Step 2: Convert to fraction form
    8,639.48/12,958.81 = 2,399.45/x
  3. Step 3: Cross multiply
    8,639.48x = 12,958.81 × 2,399.45
  4. Step 4: Simplify right side
    8,639.48x = 31,093,945.86
  5. Step 5: Solve for x
    x = 31,093,945.86/8,639.48
  6. Step 6: Final answer
    x = 3,599.05

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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.