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Finding the Fourth Proportional to 20,574.86, 30,856.19 and 8,728.48

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Solution

The fourth proportional to 20,574.86, 30,856.19 and 8,728.48 is: 13,090.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.86 : 30,856.19 = 8,728.48 : x
  2. Step 2: Convert to fraction form
    20,574.86/30,856.19 = 8,728.48/x
  3. Step 3: Cross multiply
    20,574.86x = 30,856.19 × 8,728.48
  4. Step 4: Simplify right side
    20,574.86x = 269,327,507.75
  5. Step 5: Solve for x
    x = 269,327,507.75/20,574.86
  6. Step 6: Final answer
    x = 13,090.13

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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.