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Finding the Fourth Proportional to 21,339.56, 29,448.42 and 11,907.56

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Solution

The fourth proportional to 21,339.56, 29,448.42 and 11,907.56 is: 16,432.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,339.56 : 29,448.42 = 11,907.56 : x
  2. Step 2: Convert to fraction form
    21,339.56/29,448.42 = 11,907.56/x
  3. Step 3: Cross multiply
    21,339.56x = 29,448.42 × 11,907.56
  4. Step 4: Simplify right side
    21,339.56x = 350,658,828.06
  5. Step 5: Solve for x
    x = 350,658,828.06/21,339.56
  6. Step 6: Final answer
    x = 16,432.34

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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.