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Finding the Fourth Proportional to 15,099.66, 20,839.68 and 8,814.06

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Solution

The fourth proportional to 15,099.66, 20,839.68 and 8,814.06 is: 12,164.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,099.66 : 20,839.68 = 8,814.06 : x
  2. Step 2: Convert to fraction form
    15,099.66/20,839.68 = 8,814.06/x
  3. Step 3: Cross multiply
    15,099.66x = 20,839.68 × 8,814.06
  4. Step 4: Simplify right side
    15,099.66x = 183,682,189.90
  5. Step 5: Solve for x
    x = 183,682,189.90/15,099.66
  6. Step 6: Final answer
    x = 12,164.66

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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.