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Finding the Fourth Proportional to 18,719.16, 25,832.53 and 10,221.46

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Solution

The fourth proportional to 18,719.16, 25,832.53 and 10,221.46 is: 14,105.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.16 : 25,832.53 = 10,221.46 : x
  2. Step 2: Convert to fraction form
    18,719.16/25,832.53 = 10,221.46/x
  3. Step 3: Cross multiply
    18,719.16x = 25,832.53 × 10,221.46
  4. Step 4: Simplify right side
    18,719.16x = 264,046,042.93
  5. Step 5: Solve for x
    x = 264,046,042.93/18,719.16
  6. Step 6: Final answer
    x = 14,105.66

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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.