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Finding the Fourth Proportional to 20,000.72, 27,598.92 and 11,615.60

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Solution

The fourth proportional to 20,000.72, 27,598.92 and 11,615.60 is: 16,028.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,000.72 : 27,598.92 = 11,615.60 : x
  2. Step 2: Convert to fraction form
    20,000.72/27,598.92 = 11,615.60/x
  3. Step 3: Cross multiply
    20,000.72x = 27,598.92 × 11,615.60
  4. Step 4: Simplify right side
    20,000.72x = 320,578,015.15
  5. Step 5: Solve for x
    x = 320,578,015.15/20,000.72
  6. Step 6: Final answer
    x = 16,028.32

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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.