Home / 20,538.16-28,342.64-11,106.72

Finding the Fourth Proportional to 20,538.16, 28,342.64 and 11,106.72

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Solution

The fourth proportional to 20,538.16, 28,342.64 and 11,106.72 is: 15,327.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.16 : 28,342.64 = 11,106.72 : x
  2. Step 2: Convert to fraction form
    20,538.16/28,342.64 = 11,106.72/x
  3. Step 3: Cross multiply
    20,538.16x = 28,342.64 × 11,106.72
  4. Step 4: Simplify right side
    20,538.16x = 314,793,766.54
  5. Step 5: Solve for x
    x = 314,793,766.54/20,538.16
  6. Step 6: Final answer
    x = 15,327.26

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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.