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Finding the Fourth Proportional to 9,811.91, 13,576.10 and 8,555.59

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Solution

The fourth proportional to 9,811.91, 13,576.10 and 8,555.59 is: 11,837.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,811.91 : 13,576.10 = 8,555.59 : x
  2. Step 2: Convert to fraction form
    9,811.91/13,576.10 = 8,555.59/x
  3. Step 3: Cross multiply
    9,811.91x = 13,576.10 × 8,555.59
  4. Step 4: Simplify right side
    9,811.91x = 116,151,434.74
  5. Step 5: Solve for x
    x = 116,151,434.74/9,811.91
  6. Step 6: Final answer
    x = 11,837.80

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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.