Home / 21,340.49-29,449.85-12,388.37

Finding the Fourth Proportional to 21,340.49, 29,449.85 and 12,388.37

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Solution

The fourth proportional to 21,340.49, 29,449.85 and 12,388.37 is: 17,095.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.49 : 29,449.85 = 12,388.37 : x
  2. Step 2: Convert to fraction form
    21,340.49/29,449.85 = 12,388.37/x
  3. Step 3: Cross multiply
    21,340.49x = 29,449.85 × 12,388.37
  4. Step 4: Simplify right side
    21,340.49x = 364,835,429.05
  5. Step 5: Solve for x
    x = 364,835,429.05/21,340.49
  6. Step 6: Final answer
    x = 17,095.93

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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.