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Finding the Fourth Proportional to 11,089.40, 16,619.70 and 8,007.80

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Solution

The fourth proportional to 11,089.40, 16,619.70 and 8,007.80 is: 12,001.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,089.40 : 16,619.70 = 8,007.80 : x
  2. Step 2: Convert to fraction form
    11,089.40/16,619.70 = 8,007.80/x
  3. Step 3: Cross multiply
    11,089.40x = 16,619.70 × 8,007.80
  4. Step 4: Simplify right side
    11,089.40x = 133,087,233.66
  5. Step 5: Solve for x
    x = 133,087,233.66/11,089.40
  6. Step 6: Final answer
    x = 12,001.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.