Home / 30,579.42-42,171.99-19,813.38

Finding the Fourth Proportional to 30,579.42, 42,171.99 and 19,813.38

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Solution

The fourth proportional to 30,579.42, 42,171.99 and 19,813.38 is: 27,324.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,579.42 : 42,171.99 = 19,813.38 : x
  2. Step 2: Convert to fraction form
    30,579.42/42,171.99 = 19,813.38/x
  3. Step 3: Cross multiply
    30,579.42x = 42,171.99 × 19,813.38
  4. Step 4: Simplify right side
    30,579.42x = 835,569,663.23
  5. Step 5: Solve for x
    x = 835,569,663.23/30,579.42
  6. Step 6: Final answer
    x = 27,324.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.