Home / 20,683.40-31,025.10-13,296.20

Finding the Fourth Proportional to 20,683.40, 31,025.10 and 13,296.20

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Solution

The fourth proportional to 20,683.40, 31,025.10 and 13,296.20 is: 19,944.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.40 : 31,025.10 = 13,296.20 : x
  2. Step 2: Convert to fraction form
    20,683.40/31,025.10 = 13,296.20/x
  3. Step 3: Cross multiply
    20,683.40x = 31,025.10 × 13,296.20
  4. Step 4: Simplify right side
    20,683.40x = 412,515,934.62
  5. Step 5: Solve for x
    x = 412,515,934.62/20,683.40
  6. Step 6: Final answer
    x = 19,944.30

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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.