Home / 20,288.36-30,438.36-11,975.96

Finding the Fourth Proportional to 20,288.36, 30,438.36 and 11,975.96

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Solution

The fourth proportional to 20,288.36, 30,438.36 and 11,975.96 is: 17,967.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.36 : 30,438.36 = 11,975.96 : x
  2. Step 2: Convert to fraction form
    20,288.36/30,438.36 = 11,975.96/x
  3. Step 3: Cross multiply
    20,288.36x = 30,438.36 × 11,975.96
  4. Step 4: Simplify right side
    20,288.36x = 364,528,581.83
  5. Step 5: Solve for x
    x = 364,528,581.83/20,288.36
  6. Step 6: Final answer
    x = 17,967.38

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1.5x scale

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.