Home / 20,550.36-30,830.40-8,857.20

Finding the Fourth Proportional to 20,550.36, 30,830.40 and 8,857.20

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Solution

The fourth proportional to 20,550.36, 30,830.40 and 8,857.20 is: 13,287.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.36 : 30,830.40 = 8,857.20 : x
  2. Step 2: Convert to fraction form
    20,550.36/30,830.40 = 8,857.20/x
  3. Step 3: Cross multiply
    20,550.36x = 30,830.40 × 8,857.20
  4. Step 4: Simplify right side
    20,550.36x = 273,071,018.88
  5. Step 5: Solve for x
    x = 273,071,018.88/20,550.36
  6. Step 6: Final answer
    x = 13,287.89

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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.