Home / 20,986.86-31,472.94-6,191.84

Finding the Fourth Proportional to 20,986.86, 31,472.94 and 6,191.84

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Solution

The fourth proportional to 20,986.86, 31,472.94 and 6,191.84 is: 9,285.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.86 : 31,472.94 = 6,191.84 : x
  2. Step 2: Convert to fraction form
    20,986.86/31,472.94 = 6,191.84/x
  3. Step 3: Cross multiply
    20,986.86x = 31,472.94 × 6,191.84
  4. Step 4: Simplify right side
    20,986.86x = 194,875,408.81
  5. Step 5: Solve for x
    x = 194,875,408.81/20,986.86
  6. Step 6: Final answer
    x = 9,285.59

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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.