Home / 20,683.36-31,023.60-11,890.72

Finding the Fourth Proportional to 20,683.36, 31,023.60 and 11,890.72

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Solution

The fourth proportional to 20,683.36, 31,023.60 and 11,890.72 is: 17,835.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.36 : 31,023.60 = 11,890.72 : x
  2. Step 2: Convert to fraction form
    20,683.36/31,023.60 = 11,890.72/x
  3. Step 3: Cross multiply
    20,683.36x = 31,023.60 × 11,890.72
  4. Step 4: Simplify right side
    20,683.36x = 368,892,940.99
  5. Step 5: Solve for x
    x = 368,892,940.99/20,683.36
  6. Step 6: Final answer
    x = 17,835.25

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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.