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Finding the Fourth Proportional to 20,461.92, 30,693.30 and 6,421.68

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Solution

The fourth proportional to 20,461.92, 30,693.30 and 6,421.68 is: 9,632.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,461.92 : 30,693.30 = 6,421.68 : x
  2. Step 2: Convert to fraction form
    20,461.92/30,693.30 = 6,421.68/x
  3. Step 3: Cross multiply
    20,461.92x = 30,693.30 × 6,421.68
  4. Step 4: Simplify right side
    20,461.92x = 197,102,550.74
  5. Step 5: Solve for x
    x = 197,102,550.74/20,461.92
  6. Step 6: Final answer
    x = 9,632.65

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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.