Home / 12,685.70-19,030.58-3,918.56

Finding the Fourth Proportional to 12,685.70, 19,030.58 and 3,918.56

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Solution

The fourth proportional to 12,685.70, 19,030.58 and 3,918.56 is: 5,878.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.70 : 19,030.58 = 3,918.56 : x
  2. Step 2: Convert to fraction form
    12,685.70/19,030.58 = 3,918.56/x
  3. Step 3: Cross multiply
    12,685.70x = 19,030.58 × 3,918.56
  4. Step 4: Simplify right side
    12,685.70x = 74,572,469.56
  5. Step 5: Solve for x
    x = 74,572,469.56/12,685.70
  6. Step 6: Final answer
    x = 5,878.47

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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.