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Finding the Fourth Proportional to 21,647.34, 29,873.16 and 11,711.34

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Solution

The fourth proportional to 21,647.34, 29,873.16 and 11,711.34 is: 16,161.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,647.34 : 29,873.16 = 11,711.34 : x
  2. Step 2: Convert to fraction form
    21,647.34/29,873.16 = 11,711.34/x
  3. Step 3: Cross multiply
    21,647.34x = 29,873.16 × 11,711.34
  4. Step 4: Simplify right side
    21,647.34x = 349,854,733.63
  5. Step 5: Solve for x
    x = 349,854,733.63/21,647.34
  6. Step 6: Final answer
    x = 16,161.56

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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.