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Finding the Fourth Proportional to 18,803.52, 28,209.42 and 7,116.78

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Solution

The fourth proportional to 18,803.52, 28,209.42 and 7,116.78 is: 10,676.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.52 : 28,209.42 = 7,116.78 : x
  2. Step 2: Convert to fraction form
    18,803.52/28,209.42 = 7,116.78/x
  3. Step 3: Cross multiply
    18,803.52x = 28,209.42 × 7,116.78
  4. Step 4: Simplify right side
    18,803.52x = 200,760,236.07
  5. Step 5: Solve for x
    x = 200,760,236.07/18,803.52
  6. Step 6: Final answer
    x = 10,676.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.