Home / 20,511.42-28,303.20-11,558.88

Finding the Fourth Proportional to 20,511.42, 28,303.20 and 11,558.88

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Solution

The fourth proportional to 20,511.42, 28,303.20 and 11,558.88 is: 15,949.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.42 : 28,303.20 = 11,558.88 : x
  2. Step 2: Convert to fraction form
    20,511.42/28,303.20 = 11,558.88/x
  3. Step 3: Cross multiply
    20,511.42x = 28,303.20 × 11,558.88
  4. Step 4: Simplify right side
    20,511.42x = 327,153,292.42
  5. Step 5: Solve for x
    x = 327,153,292.42/20,511.42
  6. Step 6: Final answer
    x = 15,949.81

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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.