Home / 20,706.26-31,059.40-12,388.70

Finding the Fourth Proportional to 20,706.26, 31,059.40 and 12,388.70

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Solution

The fourth proportional to 20,706.26, 31,059.40 and 12,388.70 is: 18,583.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.26 : 31,059.40 = 12,388.70 : x
  2. Step 2: Convert to fraction form
    20,706.26/31,059.40 = 12,388.70/x
  3. Step 3: Cross multiply
    20,706.26x = 31,059.40 × 12,388.70
  4. Step 4: Simplify right side
    20,706.26x = 384,785,588.78
  5. Step 5: Solve for x
    x = 384,785,588.78/20,706.26
  6. Step 6: Final answer
    x = 18,583.06

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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.