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Finding the Fourth Proportional to 20,803.64, 28,709.24 and 11,851.11

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Solution

The fourth proportional to 20,803.64, 28,709.24 and 11,851.11 is: 16,354.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.64 : 28,709.24 = 11,851.11 : x
  2. Step 2: Convert to fraction form
    20,803.64/28,709.24 = 11,851.11/x
  3. Step 3: Cross multiply
    20,803.64x = 28,709.24 × 11,851.11
  4. Step 4: Simplify right side
    20,803.64x = 340,236,302.00
  5. Step 5: Solve for x
    x = 340,236,302.00/20,803.64
  6. Step 6: Final answer
    x = 16,354.66

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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.