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Finding the Fourth Proportional to 21,045.92, 29,043.54 and 11,485.88

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Solution

The fourth proportional to 21,045.92, 29,043.54 and 11,485.88 is: 15,850.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,045.92 : 29,043.54 = 11,485.88 : x
  2. Step 2: Convert to fraction form
    21,045.92/29,043.54 = 11,485.88/x
  3. Step 3: Cross multiply
    21,045.92x = 29,043.54 × 11,485.88
  4. Step 4: Simplify right side
    21,045.92x = 333,590,615.22
  5. Step 5: Solve for x
    x = 333,590,615.22/21,045.92
  6. Step 6: Final answer
    x = 15,850.61

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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.