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Finding the Fourth Proportional to 21,062.01, 29,079.23 and 13,107.45

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Solution

The fourth proportional to 21,062.01, 29,079.23 and 13,107.45 is: 18,096.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,062.01 : 29,079.23 = 13,107.45 : x
  2. Step 2: Convert to fraction form
    21,062.01/29,079.23 = 13,107.45/x
  3. Step 3: Cross multiply
    21,062.01x = 29,079.23 × 13,107.45
  4. Step 4: Simplify right side
    21,062.01x = 381,154,487.73
  5. Step 5: Solve for x
    x = 381,154,487.73/21,062.01
  6. Step 6: Final answer
    x = 18,096.78

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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.