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Finding the Fourth Proportional to 12,085.74, 16,679.52 and 8,115.12

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Solution

The fourth proportional to 12,085.74, 16,679.52 and 8,115.12 is: 11,199.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,085.74 : 16,679.52 = 8,115.12 : x
  2. Step 2: Convert to fraction form
    12,085.74/16,679.52 = 8,115.12/x
  3. Step 3: Cross multiply
    12,085.74x = 16,679.52 × 8,115.12
  4. Step 4: Simplify right side
    12,085.74x = 135,356,306.34
  5. Step 5: Solve for x
    x = 135,356,306.34/12,085.74
  6. Step 6: Final answer
    x = 11,199.67

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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.