Home / 12,728.54-19,104.96-7,807.79

Finding the Fourth Proportional to 12,728.54, 19,104.96 and 7,807.79

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Solution

The fourth proportional to 12,728.54, 19,104.96 and 7,807.79 is: 11,719.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.54 : 19,104.96 = 7,807.79 : x
  2. Step 2: Convert to fraction form
    12,728.54/19,104.96 = 7,807.79/x
  3. Step 3: Cross multiply
    12,728.54x = 19,104.96 × 7,807.79
  4. Step 4: Simplify right side
    12,728.54x = 149,167,592.68
  5. Step 5: Solve for x
    x = 149,167,592.68/12,728.54
  6. Step 6: Final answer
    x = 11,719.14

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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.