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Finding the Fourth Proportional to 30,402.60, 45,619.92 and 21,574.94

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Solution

The fourth proportional to 30,402.60, 45,619.92 and 21,574.94 is: 32,373.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,402.60 : 45,619.92 = 21,574.94 : x
  2. Step 2: Convert to fraction form
    30,402.60/45,619.92 = 21,574.94/x
  3. Step 3: Cross multiply
    30,402.60x = 45,619.92 × 21,574.94
  4. Step 4: Simplify right side
    30,402.60x = 984,247,036.80
  5. Step 5: Solve for x
    x = 984,247,036.80/30,402.60
  6. Step 6: Final answer
    x = 32,373.78

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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.