Home / 43,309.68-64,959.12-12,147.36

Finding the Fourth Proportional to 43,309.68, 64,959.12 and 12,147.36

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Solution

The fourth proportional to 43,309.68, 64,959.12 and 12,147.36 is: 18,219.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,309.68 : 64,959.12 = 12,147.36 : x
  2. Step 2: Convert to fraction form
    43,309.68/64,959.12 = 12,147.36/x
  3. Step 3: Cross multiply
    43,309.68x = 64,959.12 × 12,147.36
  4. Step 4: Simplify right side
    43,309.68x = 789,081,815.92
  5. Step 5: Solve for x
    x = 789,081,815.92/43,309.68
  6. Step 6: Final answer
    x = 18,219.53

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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.