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Finding the Fourth Proportional to 30,323.40, 41,812.82 and 20,764.86

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Solution

The fourth proportional to 30,323.40, 41,812.82 and 20,764.86 is: 28,632.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,323.40 : 41,812.82 = 20,764.86 : x
  2. Step 2: Convert to fraction form
    30,323.40/41,812.82 = 20,764.86/x
  3. Step 3: Cross multiply
    30,323.40x = 41,812.82 × 20,764.86
  4. Step 4: Simplify right side
    30,323.40x = 868,237,353.51
  5. Step 5: Solve for x
    x = 868,237,353.51/30,323.40
  6. Step 6: Final answer
    x = 28,632.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.