Home / 21,428.75-29,572.64-11,997.32

Finding the Fourth Proportional to 21,428.75, 29,572.64 and 11,997.32

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Solution

The fourth proportional to 21,428.75, 29,572.64 and 11,997.32 is: 16,556.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.75 : 29,572.64 = 11,997.32 : x
  2. Step 2: Convert to fraction form
    21,428.75/29,572.64 = 11,997.32/x
  3. Step 3: Cross multiply
    21,428.75x = 29,572.64 × 11,997.32
  4. Step 4: Simplify right side
    21,428.75x = 354,792,329.95
  5. Step 5: Solve for x
    x = 354,792,329.95/21,428.75
  6. Step 6: Final answer
    x = 16,556.84

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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.