Home / 11,961.81-16,519.55-8,972.91

Finding the Fourth Proportional to 11,961.81, 16,519.55 and 8,972.91

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Solution

The fourth proportional to 11,961.81, 16,519.55 and 8,972.91 is: 12,391.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,961.81 : 16,519.55 = 8,972.91 : x
  2. Step 2: Convert to fraction form
    11,961.81/16,519.55 = 8,972.91/x
  3. Step 3: Cross multiply
    11,961.81x = 16,519.55 × 8,972.91
  4. Step 4: Simplify right side
    11,961.81x = 148,228,390.53
  5. Step 5: Solve for x
    x = 148,228,390.53/11,961.81
  6. Step 6: Final answer
    x = 12,391.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.