Home / 20,619.95-28,455.62-11,188.50

Finding the Fourth Proportional to 20,619.95, 28,455.62 and 11,188.50

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Solution

The fourth proportional to 20,619.95, 28,455.62 and 11,188.50 is: 15,440.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.95 : 28,455.62 = 11,188.50 : x
  2. Step 2: Convert to fraction form
    20,619.95/28,455.62 = 11,188.50/x
  3. Step 3: Cross multiply
    20,619.95x = 28,455.62 × 11,188.50
  4. Step 4: Simplify right side
    20,619.95x = 318,375,648.43
  5. Step 5: Solve for x
    x = 318,375,648.43/20,619.95
  6. Step 6: Final answer
    x = 15,440.18

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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.