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Finding the Fourth Proportional to 15,205.93, 20,984.17 and 8,491.55

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Solution

The fourth proportional to 15,205.93, 20,984.17 and 8,491.55 is: 11,718.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,205.93 : 20,984.17 = 8,491.55 : x
  2. Step 2: Convert to fraction form
    15,205.93/20,984.17 = 8,491.55/x
  3. Step 3: Cross multiply
    15,205.93x = 20,984.17 × 8,491.55
  4. Step 4: Simplify right side
    15,205.93x = 178,188,128.76
  5. Step 5: Solve for x
    x = 178,188,128.76/15,205.93
  6. Step 6: Final answer
    x = 11,718.33

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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.