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Finding the Fourth Proportional to 28,793.60, 39,736.32 and 15,873.44

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Solution

The fourth proportional to 28,793.60, 39,736.32 and 15,873.44 is: 21,905.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,793.60 : 39,736.32 = 15,873.44 : x
  2. Step 2: Convert to fraction form
    28,793.60/39,736.32 = 15,873.44/x
  3. Step 3: Cross multiply
    28,793.60x = 39,736.32 × 15,873.44
  4. Step 4: Simplify right side
    28,793.60x = 630,752,091.34
  5. Step 5: Solve for x
    x = 630,752,091.34/28,793.60
  6. Step 6: Final answer
    x = 21,905.98

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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.