Home / 21,082,871.60-31,561,321.80-12,558,820.40

Finding the Fourth Proportional to 21,082,871.60, 31,561,321.80 and 12,558,820.40

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Solution

The fourth proportional to 21,082,871.60, 31,561,321.80 and 12,558,820.40 is: 18,800,710.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,082,871.60 : 31,561,321.80 = 12,558,820.40 : x
  2. Step 2: Convert to fraction form
    21,082,871.60/31,561,321.80 = 12,558,820.40/x
  3. Step 3: Cross multiply
    21,082,871.60x = 31,561,321.80 × 12,558,820.40
  4. Step 4: Simplify right side
    21,082,871.60x = 396,372,972,072,804.75
  5. Step 5: Solve for x
    x = 396,372,972,072,804.75/21,082,871.60
  6. Step 6: Final answer
    x = 18,800,710.81

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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.