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Finding the Fourth Proportional to 21,652.31, 29,880.28 and 11,716.31

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Solution

The fourth proportional to 21,652.31, 29,880.28 and 11,716.31 is: 16,168.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,652.31 : 29,880.28 = 11,716.31 : x
  2. Step 2: Convert to fraction form
    21,652.31/29,880.28 = 11,716.31/x
  3. Step 3: Cross multiply
    21,652.31x = 29,880.28 × 11,716.31
  4. Step 4: Simplify right side
    21,652.31x = 350,086,712.71
  5. Step 5: Solve for x
    x = 350,086,712.71/21,652.31
  6. Step 6: Final answer
    x = 16,168.56

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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.