Home / 20,885.58-31,318.53-12,122.94

Finding the Fourth Proportional to 20,885.58, 31,318.53 and 12,122.94

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Solution

The fourth proportional to 20,885.58, 31,318.53 and 12,122.94 is: 18,178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.58 : 31,318.53 = 12,122.94 : x
  2. Step 2: Convert to fraction form
    20,885.58/31,318.53 = 12,122.94/x
  3. Step 3: Cross multiply
    20,885.58x = 31,318.53 × 12,122.94
  4. Step 4: Simplify right side
    20,885.58x = 379,672,660.08
  5. Step 5: Solve for x
    x = 379,672,660.08/20,885.58
  6. Step 6: Final answer
    x = 18,178.70

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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.