Home / 12,679.08-19,020.35-5,281.81

Finding the Fourth Proportional to 12,679.08, 19,020.35 and 5,281.81

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Solution

The fourth proportional to 12,679.08, 19,020.35 and 5,281.81 is: 7,923.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.08 : 19,020.35 = 5,281.81 : x
  2. Step 2: Convert to fraction form
    12,679.08/19,020.35 = 5,281.81/x
  3. Step 3: Cross multiply
    12,679.08x = 19,020.35 × 5,281.81
  4. Step 4: Simplify right side
    12,679.08x = 100,461,876.15
  5. Step 5: Solve for x
    x = 100,461,876.15/12,679.08
  6. Step 6: Final answer
    x = 7,923.43

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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.