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Finding the Fourth Proportional to 20,574.96, 30,856.08 and 7,425.66

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Solution

The fourth proportional to 20,574.96, 30,856.08 and 7,425.66 is: 11,136.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.96 : 30,856.08 = 7,425.66 : x
  2. Step 2: Convert to fraction form
    20,574.96/30,856.08 = 7,425.66/x
  3. Step 3: Cross multiply
    20,574.96x = 30,856.08 × 7,425.66
  4. Step 4: Simplify right side
    20,574.96x = 229,126,759.01
  5. Step 5: Solve for x
    x = 229,126,759.01/20,574.96
  6. Step 6: Final answer
    x = 11,136.19

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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.