Home / 13,272.87-19,945.77-12,405.99

Finding the Fourth Proportional to 13,272.87, 19,945.77 and 12,405.99

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Solution

The fourth proportional to 13,272.87, 19,945.77 and 12,405.99 is: 18,643.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,272.87 : 19,945.77 = 12,405.99 : x
  2. Step 2: Convert to fraction form
    13,272.87/19,945.77 = 12,405.99/x
  3. Step 3: Cross multiply
    13,272.87x = 19,945.77 × 12,405.99
  4. Step 4: Simplify right side
    13,272.87x = 247,447,023.16
  5. Step 5: Solve for x
    x = 247,447,023.16/13,272.87
  6. Step 6: Final answer
    x = 18,643.07

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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.