Home / 20,717.72-31,103.67-12,299.59

Finding the Fourth Proportional to 20,717.72, 31,103.67 and 12,299.59

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Solution

The fourth proportional to 20,717.72, 31,103.67 and 12,299.59 is: 18,465.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.72 : 31,103.67 = 12,299.59 : x
  2. Step 2: Convert to fraction form
    20,717.72/31,103.67 = 12,299.59/x
  3. Step 3: Cross multiply
    20,717.72x = 31,103.67 × 12,299.59
  4. Step 4: Simplify right side
    20,717.72x = 382,562,232.98
  5. Step 5: Solve for x
    x = 382,562,232.98/20,717.72
  6. Step 6: Final answer
    x = 18,465.46

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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.