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Finding the Fourth Proportional to 15,135.92, 20,880.80 and 8,845.52

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Solution

The fourth proportional to 15,135.92, 20,880.80 and 8,845.52 is: 12,202.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,135.92 : 20,880.80 = 8,845.52 : x
  2. Step 2: Convert to fraction form
    15,135.92/20,880.80 = 8,845.52/x
  3. Step 3: Cross multiply
    15,135.92x = 20,880.80 × 8,845.52
  4. Step 4: Simplify right side
    15,135.92x = 184,701,534.02
  5. Step 5: Solve for x
    x = 184,701,534.02/15,135.92
  6. Step 6: Final answer
    x = 12,202.86

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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.