Home / 15,945.23-21,993.22-13,816.99

Finding the Fourth Proportional to 15,945.23, 21,993.22 and 13,816.99

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Solution

The fourth proportional to 15,945.23, 21,993.22 and 13,816.99 is: 19,057.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,945.23 : 21,993.22 = 13,816.99 : x
  2. Step 2: Convert to fraction form
    15,945.23/21,993.22 = 13,816.99/x
  3. Step 3: Cross multiply
    15,945.23x = 21,993.22 × 13,816.99
  4. Step 4: Simplify right side
    15,945.23x = 303,880,145.57
  5. Step 5: Solve for x
    x = 303,880,145.57/15,945.23
  6. Step 6: Final answer
    x = 19,057.74

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1.5x scale

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.