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Finding the Fourth Proportional to 15,155.94, 20,915.85 and 8,441.57

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Solution

The fourth proportional to 15,155.94, 20,915.85 and 8,441.57 is: 11,649.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.94 : 20,915.85 = 8,441.57 : x
  2. Step 2: Convert to fraction form
    15,155.94/20,915.85 = 8,441.57/x
  3. Step 3: Cross multiply
    15,155.94x = 20,915.85 × 8,441.57
  4. Step 4: Simplify right side
    15,155.94x = 176,562,554.08
  5. Step 5: Solve for x
    x = 176,562,554.08/15,155.94
  6. Step 6: Final answer
    x = 11,649.73

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.