Home / 12,805.09-19,219.61-7,884.34

Finding the Fourth Proportional to 12,805.09, 19,219.61 and 7,884.34

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Solution

The fourth proportional to 12,805.09, 19,219.61 and 7,884.34 is: 11,833.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,805.09 : 19,219.61 = 7,884.34 : x
  2. Step 2: Convert to fraction form
    12,805.09/19,219.61 = 7,884.34/x
  3. Step 3: Cross multiply
    12,805.09x = 19,219.61 × 7,884.34
  4. Step 4: Simplify right side
    12,805.09x = 151,533,911.57
  5. Step 5: Solve for x
    x = 151,533,911.57/12,805.09
  6. Step 6: Final answer
    x = 11,833.88

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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.