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Finding the Fourth Proportional to 20,574.32, 30,861.44 and 7,426.48

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Solution

The fourth proportional to 20,574.32, 30,861.44 and 7,426.48 is: 11,139.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.32 : 30,861.44 = 7,426.48 : x
  2. Step 2: Convert to fraction form
    20,574.32/30,861.44 = 7,426.48/x
  3. Step 3: Cross multiply
    20,574.32x = 30,861.44 × 7,426.48
  4. Step 4: Simplify right side
    20,574.32x = 229,191,866.93
  5. Step 5: Solve for x
    x = 229,191,866.93/20,574.32
  6. Step 6: Final answer
    x = 11,139.71

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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.