Home / 20,968.88-28,935.72-11,408.67

Finding the Fourth Proportional to 20,968.88, 28,935.72 and 11,408.67

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Solution

The fourth proportional to 20,968.88, 28,935.72 and 11,408.67 is: 15,743.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.88 : 28,935.72 = 11,408.67 : x
  2. Step 2: Convert to fraction form
    20,968.88/28,935.72 = 11,408.67/x
  3. Step 3: Cross multiply
    20,968.88x = 28,935.72 × 11,408.67
  4. Step 4: Simplify right side
    20,968.88x = 330,118,080.69
  5. Step 5: Solve for x
    x = 330,118,080.69/20,968.88
  6. Step 6: Final answer
    x = 15,743.24

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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.