Home / 20,975.22-28,946.36-11,415.67

Finding the Fourth Proportional to 20,975.22, 28,946.36 and 11,415.67

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Solution

The fourth proportional to 20,975.22, 28,946.36 and 11,415.67 is: 15,753.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.22 : 28,946.36 = 11,415.67 : x
  2. Step 2: Convert to fraction form
    20,975.22/28,946.36 = 11,415.67/x
  3. Step 3: Cross multiply
    20,975.22x = 28,946.36 × 11,415.67
  4. Step 4: Simplify right side
    20,975.22x = 330,442,093.46
  5. Step 5: Solve for x
    x = 330,442,093.46/20,975.22
  6. Step 6: Final answer
    x = 15,753.93

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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.