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Finding the Fourth Proportional to 20,457.66, 30,658.05 and 9,336.54

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Solution

The fourth proportional to 20,457.66, 30,658.05 and 9,336.54 is: 13,991.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,457.66 : 30,658.05 = 9,336.54 : x
  2. Step 2: Convert to fraction form
    20,457.66/30,658.05 = 9,336.54/x
  3. Step 3: Cross multiply
    20,457.66x = 30,658.05 × 9,336.54
  4. Step 4: Simplify right side
    20,457.66x = 286,240,110.15
  5. Step 5: Solve for x
    x = 286,240,110.15/20,457.66
  6. Step 6: Final answer
    x = 13,991.83

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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.