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Finding the Fourth Proportional to 21,794.46, 30,040.42 and 15,412.81

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Solution

The fourth proportional to 21,794.46, 30,040.42 and 15,412.81 is: 21,244.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,794.46 : 30,040.42 = 15,412.81 : x
  2. Step 2: Convert to fraction form
    21,794.46/30,040.42 = 15,412.81/x
  3. Step 3: Cross multiply
    21,794.46x = 30,040.42 × 15,412.81
  4. Step 4: Simplify right side
    21,794.46x = 463,007,285.78
  5. Step 5: Solve for x
    x = 463,007,285.78/21,794.46
  6. Step 6: Final answer
    x = 21,244.27

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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.