Home / 11,861.10-16,370.10-7,147.98

Finding the Fourth Proportional to 11,861.10, 16,370.10 and 7,147.98

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Solution

The fourth proportional to 11,861.10, 16,370.10 and 7,147.98 is: 9,865.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,861.10 : 16,370.10 = 7,147.98 : x
  2. Step 2: Convert to fraction form
    11,861.10/16,370.10 = 7,147.98/x
  3. Step 3: Cross multiply
    11,861.10x = 16,370.10 × 7,147.98
  4. Step 4: Simplify right side
    11,861.10x = 117,013,147.40
  5. Step 5: Solve for x
    x = 117,013,147.40/11,861.10
  6. Step 6: Final answer
    x = 9,865.29

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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.