Home / 21,289.70-29,377.68-11,858.06

Finding the Fourth Proportional to 21,289.70, 29,377.68 and 11,858.06

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Solution

The fourth proportional to 21,289.70, 29,377.68 and 11,858.06 is: 16,362.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.70 : 29,377.68 = 11,858.06 : x
  2. Step 2: Convert to fraction form
    21,289.70/29,377.68 = 11,858.06/x
  3. Step 3: Cross multiply
    21,289.70x = 29,377.68 × 11,858.06
  4. Step 4: Simplify right side
    21,289.70x = 348,362,292.10
  5. Step 5: Solve for x
    x = 348,362,292.10/21,289.70
  6. Step 6: Final answer
    x = 16,362.95

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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.