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Finding the Fourth Proportional to 8,899.99, 12,256.97 and 8,706.22

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Solution

The fourth proportional to 8,899.99, 12,256.97 and 8,706.22 is: 11,990.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,899.99 : 12,256.97 = 8,706.22 : x
  2. Step 2: Convert to fraction form
    8,899.99/12,256.97 = 8,706.22/x
  3. Step 3: Cross multiply
    8,899.99x = 12,256.97 × 8,706.22
  4. Step 4: Simplify right side
    8,899.99x = 106,711,803.18
  5. Step 5: Solve for x
    x = 106,711,803.18/8,899.99
  6. Step 6: Final answer
    x = 11,990.11

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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.