Home / 42,727.60-64,065.80-21,991.60

Finding the Fourth Proportional to 42,727.60, 64,065.80 and 21,991.60

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Solution

The fourth proportional to 42,727.60, 64,065.80 and 21,991.60 is: 32,974.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,727.60 : 64,065.80 = 21,991.60 : x
  2. Step 2: Convert to fraction form
    42,727.60/64,065.80 = 21,991.60/x
  3. Step 3: Cross multiply
    42,727.60x = 64,065.80 × 21,991.60
  4. Step 4: Simplify right side
    42,727.60x = 1,408,909,447.28
  5. Step 5: Solve for x
    x = 1,408,909,447.28/42,727.60
  6. Step 6: Final answer
    x = 32,974.22

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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.