Home / 21,371.87-29,501.42-19,129.79

Finding the Fourth Proportional to 21,371.87, 29,501.42 and 19,129.79

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Solution

The fourth proportional to 21,371.87, 29,501.42 and 19,129.79 is: 26,406.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,371.87 : 29,501.42 = 19,129.79 : x
  2. Step 2: Convert to fraction form
    21,371.87/29,501.42 = 19,129.79/x
  3. Step 3: Cross multiply
    21,371.87x = 29,501.42 × 19,129.79
  4. Step 4: Simplify right side
    21,371.87x = 564,355,947.41
  5. Step 5: Solve for x
    x = 564,355,947.41/21,371.87
  6. Step 6: Final answer
    x = 26,406.48

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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.