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Finding the Fourth Proportional to 11,383.10, 15,701.90 and 8,861.21

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Solution

The fourth proportional to 11,383.10, 15,701.90 and 8,861.21 is: 12,223.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,383.10 : 15,701.90 = 8,861.21 : x
  2. Step 2: Convert to fraction form
    11,383.10/15,701.90 = 8,861.21/x
  3. Step 3: Cross multiply
    11,383.10x = 15,701.90 × 8,861.21
  4. Step 4: Simplify right side
    11,383.10x = 139,137,894.71
  5. Step 5: Solve for x
    x = 139,137,894.71/11,383.10
  6. Step 6: Final answer
    x = 12,223.20

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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.