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Finding the Fourth Proportional to 28,978,489.23, 39,991,273.89 and 15,926,210.79

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Solution

The fourth proportional to 28,978,489.23, 39,991,273.89 and 15,926,210.79 is: 21,978,697.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978,489.23 : 39,991,273.89 = 15,926,210.79 : x
  2. Step 2: Convert to fraction form
    28,978,489.23/39,991,273.89 = 15,926,210.79/x
  3. Step 3: Cross multiply
    28,978,489.23x = 39,991,273.89 × 15,926,210.79
  4. Step 4: Simplify right side
    28,978,489.23x = 636,909,457,732,763.25
  5. Step 5: Solve for x
    x = 636,909,457,732,763.25/28,978,489.23
  6. Step 6: Final answer
    x = 21,978,697.81

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Why These Related Problems?

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