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Finding the Fourth Proportional to 12,088,978.40, 18,147,464.40 and 7,302,072.80

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Solution

The fourth proportional to 12,088,978.40, 18,147,464.40 and 7,302,072.80 is: 10,961,563.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,088,978.40 : 18,147,464.40 = 7,302,072.80 : x
  2. Step 2: Convert to fraction form
    12,088,978.40/18,147,464.40 = 7,302,072.80/x
  3. Step 3: Cross multiply
    12,088,978.40x = 18,147,464.40 × 7,302,072.80
  4. Step 4: Simplify right side
    12,088,978.40x = 132,514,106,184,208.31
  5. Step 5: Solve for x
    x = 132,514,106,184,208.31/12,088,978.40
  6. Step 6: Final answer
    x = 10,961,563.65

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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.