Home / 20,518.60-28,315.70-11,087.18

Finding the Fourth Proportional to 20,518.60, 28,315.70 and 11,087.18

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Solution

The fourth proportional to 20,518.60, 28,315.70 and 11,087.18 is: 15,300.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.60 : 28,315.70 = 11,087.18 : x
  2. Step 2: Convert to fraction form
    20,518.60/28,315.70 = 11,087.18/x
  3. Step 3: Cross multiply
    20,518.60x = 28,315.70 × 11,087.18
  4. Step 4: Simplify right side
    20,518.60x = 313,941,262.73
  5. Step 5: Solve for x
    x = 313,941,262.73/20,518.60
  6. Step 6: Final answer
    x = 15,300.33

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.