Home / 28,003,760-42,012,724.80-7,809,004.16

Finding the Fourth Proportional to 28,003,760, 42,012,724.80 and 7,809,004.16

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Solution

The fourth proportional to 28,003,760, 42,012,724.80 and 7,809,004.16 is: 11,715,481.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,003,760 : 42,012,724.80 = 7,809,004.16 : x
  2. Step 2: Convert to fraction form
    28,003,760/42,012,724.80 = 7,809,004.16/x
  3. Step 3: Cross multiply
    28,003,760x = 42,012,724.80 × 7,809,004.16
  4. Step 4: Simplify right side
    28,003,760x = 328,077,542,736,135.12
  5. Step 5: Solve for x
    x = 328,077,542,736,135.12/28,003,760
  6. Step 6: Final answer
    x = 11,715,481.88

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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.