Home / 21,166,871.28-31,740,036.09-12,415,540.56

Finding the Fourth Proportional to 21,166,871.28, 31,740,036.09 and 12,415,540.56

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Solution

The fourth proportional to 21,166,871.28, 31,740,036.09 and 12,415,540.56 is: 18,617,286.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166,871.28 : 31,740,036.09 = 12,415,540.56 : x
  2. Step 2: Convert to fraction form
    21,166,871.28/31,740,036.09 = 12,415,540.56/x
  3. Step 3: Cross multiply
    21,166,871.28x = 31,740,036.09 × 12,415,540.56
  4. Step 4: Simplify right side
    21,166,871.28x = 394,069,705,451,258.81
  5. Step 5: Solve for x
    x = 394,069,705,451,258.81/21,166,871.28
  6. Step 6: Final answer
    x = 18,617,286.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.