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Finding the Fourth Proportional to 15,072.72, 20,793.36 and 9,769.32

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Solution

The fourth proportional to 15,072.72, 20,793.36 and 9,769.32 is: 13,477.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072.72 : 20,793.36 = 9,769.32 : x
  2. Step 2: Convert to fraction form
    15,072.72/20,793.36 = 9,769.32/x
  3. Step 3: Cross multiply
    15,072.72x = 20,793.36 × 9,769.32
  4. Step 4: Simplify right side
    15,072.72x = 203,136,987.72
  5. Step 5: Solve for x
    x = 203,136,987.72/15,072.72
  6. Step 6: Final answer
    x = 13,477.13

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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.