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Finding the Fourth Proportional to 20,562.21, 30,836.94 and 7,412.88

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Solution

The fourth proportional to 20,562.21, 30,836.94 and 7,412.88 is: 11,117.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.21 : 30,836.94 = 7,412.88 : x
  2. Step 2: Convert to fraction form
    20,562.21/30,836.94 = 7,412.88/x
  3. Step 3: Cross multiply
    20,562.21x = 30,836.94 × 7,412.88
  4. Step 4: Simplify right side
    20,562.21x = 228,590,535.79
  5. Step 5: Solve for x
    x = 228,590,535.79/20,562.21
  6. Step 6: Final answer
    x = 11,117.02

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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.