Home / 20,270.10-30,383.55-7,785.30

Finding the Fourth Proportional to 20,270.10, 30,383.55 and 7,785.30

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Solution

The fourth proportional to 20,270.10, 30,383.55 and 7,785.30 is: 11,669.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,270.10 : 30,383.55 = 7,785.30 : x
  2. Step 2: Convert to fraction form
    20,270.10/30,383.55 = 7,785.30/x
  3. Step 3: Cross multiply
    20,270.10x = 30,383.55 × 7,785.30
  4. Step 4: Simplify right side
    20,270.10x = 236,545,051.82
  5. Step 5: Solve for x
    x = 236,545,051.82/20,270.10
  6. Step 6: Final answer
    x = 11,669.65

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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.