Home / 20,680.32-31,039.84-13,759.68

Finding the Fourth Proportional to 20,680.32, 31,039.84 and 13,759.68

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Solution

The fourth proportional to 20,680.32, 31,039.84 and 13,759.68 is: 20,652.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.32 : 31,039.84 = 13,759.68 : x
  2. Step 2: Convert to fraction form
    20,680.32/31,039.84 = 13,759.68/x
  3. Step 3: Cross multiply
    20,680.32x = 31,039.84 × 13,759.68
  4. Step 4: Simplify right side
    20,680.32x = 427,098,265.65
  5. Step 5: Solve for x
    x = 427,098,265.65/20,680.32
  6. Step 6: Final answer
    x = 20,652.40

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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.