Home / 20,436.88-30,639.03-18,796.72

Finding the Fourth Proportional to 20,436.88, 30,639.03 and 18,796.72

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Solution

The fourth proportional to 20,436.88, 30,639.03 and 18,796.72 is: 28,180.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,436.88 : 30,639.03 = 18,796.72 : x
  2. Step 2: Convert to fraction form
    20,436.88/30,639.03 = 18,796.72/x
  3. Step 3: Cross multiply
    20,436.88x = 30,639.03 × 18,796.72
  4. Step 4: Simplify right side
    20,436.88x = 575,913,267.98
  5. Step 5: Solve for x
    x = 575,913,267.98/20,436.88
  6. Step 6: Final answer
    x = 28,180.10

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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.