Home / 20,759.85-28,639.04-12,259.71

Finding the Fourth Proportional to 20,759.85, 28,639.04 and 12,259.71

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Solution

The fourth proportional to 20,759.85, 28,639.04 and 12,259.71 is: 16,912.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.85 : 28,639.04 = 12,259.71 : x
  2. Step 2: Convert to fraction form
    20,759.85/28,639.04 = 12,259.71/x
  3. Step 3: Cross multiply
    20,759.85x = 28,639.04 × 12,259.71
  4. Step 4: Simplify right side
    20,759.85x = 351,106,263.78
  5. Step 5: Solve for x
    x = 351,106,263.78/20,759.85
  6. Step 6: Final answer
    x = 16,912.76

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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.