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Finding the Fourth Proportional to 15,206.26, 20,984.43 and 8,491.99

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Solution

The fourth proportional to 15,206.26, 20,984.43 and 8,491.99 is: 11,718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,206.26 : 20,984.43 = 8,491.99 : x
  2. Step 2: Convert to fraction form
    15,206.26/20,984.43 = 8,491.99/x
  3. Step 3: Cross multiply
    15,206.26x = 20,984.43 × 8,491.99
  4. Step 4: Simplify right side
    15,206.26x = 178,199,569.72
  5. Step 5: Solve for x
    x = 178,199,569.72/15,206.26
  6. Step 6: Final answer
    x = 11,718.83

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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.