Home / 20,304.39-30,435.84-11,520.75

Finding the Fourth Proportional to 20,304.39, 30,435.84 and 11,520.75

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Solution

The fourth proportional to 20,304.39, 30,435.84 and 11,520.75 is: 17,269.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,304.39 : 30,435.84 = 11,520.75 : x
  2. Step 2: Convert to fraction form
    20,304.39/30,435.84 = 11,520.75/x
  3. Step 3: Cross multiply
    20,304.39x = 30,435.84 × 11,520.75
  4. Step 4: Simplify right side
    20,304.39x = 350,643,703.68
  5. Step 5: Solve for x
    x = 350,643,703.68/20,304.39
  6. Step 6: Final answer
    x = 17,269.35

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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.