Home / 20,627.64-30,878.04-13,239.21

Finding the Fourth Proportional to 20,627.64, 30,878.04 and 13,239.21

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Solution

The fourth proportional to 20,627.64, 30,878.04 and 13,239.21 is: 19,818.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,627.64 : 30,878.04 = 13,239.21 : x
  2. Step 2: Convert to fraction form
    20,627.64/30,878.04 = 13,239.21/x
  3. Step 3: Cross multiply
    20,627.64x = 30,878.04 × 13,239.21
  4. Step 4: Simplify right side
    20,627.64x = 408,800,855.95
  5. Step 5: Solve for x
    x = 408,800,855.95/20,627.64
  6. Step 6: Final answer
    x = 19,818.11

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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.