Home / 13,632.78-20,416.34-7,771.62

Finding the Fourth Proportional to 13,632.78, 20,416.34 and 7,771.62

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Solution

The fourth proportional to 13,632.78, 20,416.34 and 7,771.62 is: 11,638.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,632.78 : 20,416.34 = 7,771.62 : x
  2. Step 2: Convert to fraction form
    13,632.78/20,416.34 = 7,771.62/x
  3. Step 3: Cross multiply
    13,632.78x = 20,416.34 × 7,771.62
  4. Step 4: Simplify right side
    13,632.78x = 158,668,036.27
  5. Step 5: Solve for x
    x = 158,668,036.27/13,632.78
  6. Step 6: Final answer
    x = 11,638.71

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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.