Home / 20,319.78-30,476.58-7,845.72

Finding the Fourth Proportional to 20,319.78, 30,476.58 and 7,845.72

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Solution

The fourth proportional to 20,319.78, 30,476.58 and 7,845.72 is: 11,767.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.78 : 30,476.58 = 7,845.72 : x
  2. Step 2: Convert to fraction form
    20,319.78/30,476.58 = 7,845.72/x
  3. Step 3: Cross multiply
    20,319.78x = 30,476.58 × 7,845.72
  4. Step 4: Simplify right side
    20,319.78x = 239,110,713.24
  5. Step 5: Solve for x
    x = 239,110,713.24/20,319.78
  6. Step 6: Final answer
    x = 11,767.39

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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.