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Finding the Fourth Proportional to 18,803.35, 28,201.37 and 7,117.48

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Solution

The fourth proportional to 18,803.35, 28,201.37 and 7,117.48 is: 10,674.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.35 : 28,201.37 = 7,117.48 : x
  2. Step 2: Convert to fraction form
    18,803.35/28,201.37 = 7,117.48/x
  3. Step 3: Cross multiply
    18,803.35x = 28,201.37 × 7,117.48
  4. Step 4: Simplify right side
    18,803.35x = 200,722,686.95
  5. Step 5: Solve for x
    x = 200,722,686.95/18,803.35
  6. Step 6: Final answer
    x = 10,674.84

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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.