Home / 20,289.92-28,000.67-11,338.43

Finding the Fourth Proportional to 20,289.92, 28,000.67 and 11,338.43

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Solution

The fourth proportional to 20,289.92, 28,000.67 and 11,338.43 is: 15,647.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.92 : 28,000.67 = 11,338.43 : x
  2. Step 2: Convert to fraction form
    20,289.92/28,000.67 = 11,338.43/x
  3. Step 3: Cross multiply
    20,289.92x = 28,000.67 × 11,338.43
  4. Step 4: Simplify right side
    20,289.92x = 317,483,440.05
  5. Step 5: Solve for x
    x = 317,483,440.05/20,289.92
  6. Step 6: Final answer
    x = 15,647.35

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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.