Home / 20,883.10-31,324.20-13,907.80

Finding the Fourth Proportional to 20,883.10, 31,324.20 and 13,907.80

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Solution

The fourth proportional to 20,883.10, 31,324.20 and 13,907.80 is: 20,861.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.10 : 31,324.20 = 13,907.80 : x
  2. Step 2: Convert to fraction form
    20,883.10/31,324.20 = 13,907.80/x
  3. Step 3: Cross multiply
    20,883.10x = 31,324.20 × 13,907.80
  4. Step 4: Simplify right side
    20,883.10x = 435,650,708.76
  5. Step 5: Solve for x
    x = 435,650,708.76/20,883.10
  6. Step 6: Final answer
    x = 20,861.40

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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.