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Finding the Fourth Proportional to 20,471.56, 30,708.78 and 13,895.08

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Solution

The fourth proportional to 20,471.56, 30,708.78 and 13,895.08 is: 20,843.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.56 : 30,708.78 = 13,895.08 : x
  2. Step 2: Convert to fraction form
    20,471.56/30,708.78 = 13,895.08/x
  3. Step 3: Cross multiply
    20,471.56x = 30,708.78 × 13,895.08
  4. Step 4: Simplify right side
    20,471.56x = 426,700,954.80
  5. Step 5: Solve for x
    x = 426,700,954.80/20,471.56
  6. Step 6: Final answer
    x = 20,843.60

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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.