Home / 20,722.50-28,597.05-11,291.06

Finding the Fourth Proportional to 20,722.50, 28,597.05 and 11,291.06

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Solution

The fourth proportional to 20,722.50, 28,597.05 and 11,291.06 is: 15,581.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.50 : 28,597.05 = 11,291.06 : x
  2. Step 2: Convert to fraction form
    20,722.50/28,597.05 = 11,291.06/x
  3. Step 3: Cross multiply
    20,722.50x = 28,597.05 × 11,291.06
  4. Step 4: Simplify right side
    20,722.50x = 322,891,078.87
  5. Step 5: Solve for x
    x = 322,891,078.87/20,722.50
  6. Step 6: Final answer
    x = 15,581.67

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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.