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Finding the Fourth Proportional to 18,637,658.40, 27,939,866.40 and 7,275,464.40

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Solution

The fourth proportional to 18,637,658.40, 27,939,866.40 and 7,275,464.40 is: 10,906,708.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,637,658.40 : 27,939,866.40 = 7,275,464.40 : x
  2. Step 2: Convert to fraction form
    18,637,658.40/27,939,866.40 = 7,275,464.40/x
  3. Step 3: Cross multiply
    18,637,658.40x = 27,939,866.40 × 7,275,464.40
  4. Step 4: Simplify right side
    18,637,658.40x = 203,275,503,333,956.16
  5. Step 5: Solve for x
    x = 203,275,503,333,956.16/18,637,658.40
  6. Step 6: Final answer
    x = 10,906,708.29

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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.