Home / 20,319.47-28,039.56-11,365.43

Finding the Fourth Proportional to 20,319.47, 28,039.56 and 11,365.43

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Solution

The fourth proportional to 20,319.47, 28,039.56 and 11,365.43 is: 15,683.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.47 : 28,039.56 = 11,365.43 : x
  2. Step 2: Convert to fraction form
    20,319.47/28,039.56 = 11,365.43/x
  3. Step 3: Cross multiply
    20,319.47x = 28,039.56 × 11,365.43
  4. Step 4: Simplify right side
    20,319.47x = 318,681,516.21
  5. Step 5: Solve for x
    x = 318,681,516.21/20,319.47
  6. Step 6: Final answer
    x = 15,683.56

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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.