Home / 12,679.36-19,008.78-5,289.34

Finding the Fourth Proportional to 12,679.36, 19,008.78 and 5,289.34

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Solution

The fourth proportional to 12,679.36, 19,008.78 and 5,289.34 is: 7,929.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.36 : 19,008.78 = 5,289.34 : x
  2. Step 2: Convert to fraction form
    12,679.36/19,008.78 = 5,289.34/x
  3. Step 3: Cross multiply
    12,679.36x = 19,008.78 × 5,289.34
  4. Step 4: Simplify right side
    12,679.36x = 100,543,900.41
  5. Step 5: Solve for x
    x = 100,543,900.41/12,679.36
  6. Step 6: Final answer
    x = 7,929.73

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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.