Home / 31,790.07-47,679.70-8,418.87

Finding the Fourth Proportional to 31,790.07, 47,679.70 and 8,418.87

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Solution

The fourth proportional to 31,790.07, 47,679.70 and 8,418.87 is: 12,626.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,790.07 : 47,679.70 = 8,418.87 : x
  2. Step 2: Convert to fraction form
    31,790.07/47,679.70 = 8,418.87/x
  3. Step 3: Cross multiply
    31,790.07x = 47,679.70 × 8,418.87
  4. Step 4: Simplify right side
    31,790.07x = 401,409,195.94
  5. Step 5: Solve for x
    x = 401,409,195.94/31,790.07
  6. Step 6: Final answer
    x = 12,626.87

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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.