Home / 20,786.42-31,193.30-7,638.91

Finding the Fourth Proportional to 20,786.42, 31,193.30 and 7,638.91

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Solution

The fourth proportional to 20,786.42, 31,193.30 and 7,638.91 is: 11,463.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.42 : 31,193.30 = 7,638.91 : x
  2. Step 2: Convert to fraction form
    20,786.42/31,193.30 = 7,638.91/x
  3. Step 3: Cross multiply
    20,786.42x = 31,193.30 × 7,638.91
  4. Step 4: Simplify right side
    20,786.42x = 238,282,752.42
  5. Step 5: Solve for x
    x = 238,282,752.42/20,786.42
  6. Step 6: Final answer
    x = 11,463.38

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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.