Home / 20,744.64-28,635.84-12,794.40

Finding the Fourth Proportional to 20,744.64, 28,635.84 and 12,794.40

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Solution

The fourth proportional to 20,744.64, 28,635.84 and 12,794.40 is: 17,661.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,744.64 : 28,635.84 = 12,794.40 : x
  2. Step 2: Convert to fraction form
    20,744.64/28,635.84 = 12,794.40/x
  3. Step 3: Cross multiply
    20,744.64x = 28,635.84 × 12,794.40
  4. Step 4: Simplify right side
    20,744.64x = 366,378,391.30
  5. Step 5: Solve for x
    x = 366,378,391.30/20,744.64
  6. Step 6: Final answer
    x = 17,661.35

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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.