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Finding the Fourth Proportional to 12,686,928.57, 17,507,978.73 and 6,885,710.37

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Solution

The fourth proportional to 12,686,928.57, 17,507,978.73 and 6,885,710.37 is: 9,502,289.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686,928.57 : 17,507,978.73 = 6,885,710.37 : x
  2. Step 2: Convert to fraction form
    12,686,928.57/17,507,978.73 = 6,885,710.37/x
  3. Step 3: Cross multiply
    12,686,928.57x = 17,507,978.73 × 6,885,710.37
  4. Step 4: Simplify right side
    12,686,928.57x = 120,554,870,698,900.44
  5. Step 5: Solve for x
    x = 120,554,870,698,900.44/12,686,928.57
  6. Step 6: Final answer
    x = 9,502,289.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.