Home / 20,453.60-30,680.40-13,455.20

Finding the Fourth Proportional to 20,453.60, 30,680.40 and 13,455.20

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Solution

The fourth proportional to 20,453.60, 30,680.40 and 13,455.20 is: 20,182.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,453.60 : 30,680.40 = 13,455.20 : x
  2. Step 2: Convert to fraction form
    20,453.60/30,680.40 = 13,455.20/x
  3. Step 3: Cross multiply
    20,453.60x = 30,680.40 × 13,455.20
  4. Step 4: Simplify right side
    20,453.60x = 412,810,918.08
  5. Step 5: Solve for x
    x = 412,810,918.08/20,453.60
  6. Step 6: Final answer
    x = 20,182.80

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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.