Home / 21,004,811.80-31,507,217.70-12,021,976.60

Finding the Fourth Proportional to 21,004,811.80, 31,507,217.70 and 12,021,976.60

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Solution

The fourth proportional to 21,004,811.80, 31,507,217.70 and 12,021,976.60 is: 18,032,964.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004,811.80 : 31,507,217.70 = 12,021,976.60 : x
  2. Step 2: Convert to fraction form
    21,004,811.80/31,507,217.70 = 12,021,976.60/x
  3. Step 3: Cross multiply
    21,004,811.80x = 31,507,217.70 × 12,021,976.60
  4. Step 4: Simplify right side
    21,004,811.80x = 378,779,033,920,505.81
  5. Step 5: Solve for x
    x = 378,779,033,920,505.81/21,004,811.80
  6. Step 6: Final answer
    x = 18,032,964.90

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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.