Home / 20,518.56-28,315.71-11,566.44

Finding the Fourth Proportional to 20,518.56, 28,315.71 and 11,566.44

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Solution

The fourth proportional to 20,518.56, 28,315.71 and 11,566.44 is: 15,961.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.56 : 28,315.71 = 11,566.44 : x
  2. Step 2: Convert to fraction form
    20,518.56/28,315.71 = 11,566.44/x
  3. Step 3: Cross multiply
    20,518.56x = 28,315.71 × 11,566.44
  4. Step 4: Simplify right side
    20,518.56x = 327,511,960.77
  5. Step 5: Solve for x
    x = 327,511,960.77/20,518.56
  6. Step 6: Final answer
    x = 15,961.74

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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.