Home / 21,483.11-29,640.62-13,929.75

Finding the Fourth Proportional to 21,483.11, 29,640.62 and 13,929.75

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Solution

The fourth proportional to 21,483.11, 29,640.62 and 13,929.75 is: 19,219.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,483.11 : 29,640.62 = 13,929.75 : x
  2. Step 2: Convert to fraction form
    21,483.11/29,640.62 = 13,929.75/x
  3. Step 3: Cross multiply
    21,483.11x = 29,640.62 × 13,929.75
  4. Step 4: Simplify right side
    21,483.11x = 412,886,356.80
  5. Step 5: Solve for x
    x = 412,886,356.80/21,483.11
  6. Step 6: Final answer
    x = 19,219.12

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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.