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Finding the Fourth Proportional to 20,370.80, 30,604.80 and 18,232.40

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Solution

The fourth proportional to 20,370.80, 30,604.80 and 18,232.40 is: 27,392.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.80 : 30,604.80 = 18,232.40 : x
  2. Step 2: Convert to fraction form
    20,370.80/30,604.80 = 18,232.40/x
  3. Step 3: Cross multiply
    20,370.80x = 30,604.80 × 18,232.40
  4. Step 4: Simplify right side
    20,370.80x = 557,998,955.52
  5. Step 5: Solve for x
    x = 557,998,955.52/20,370.80
  6. Step 6: Final answer
    x = 27,392.10

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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.