Home / 20,309.78-30,460.96-9,213.79

Finding the Fourth Proportional to 20,309.78, 30,460.96 and 9,213.79

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Solution

The fourth proportional to 20,309.78, 30,460.96 and 9,213.79 is: 13,819.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,309.78 : 30,460.96 = 9,213.79 : x
  2. Step 2: Convert to fraction form
    20,309.78/30,460.96 = 9,213.79/x
  3. Step 3: Cross multiply
    20,309.78x = 30,460.96 × 9,213.79
  4. Step 4: Simplify right side
    20,309.78x = 280,660,888.64
  5. Step 5: Solve for x
    x = 280,660,888.64/20,309.78
  6. Step 6: Final answer
    x = 13,819.00

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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.