Home / 13,578.60-18,739.62-7,913.81

Finding the Fourth Proportional to 13,578.60, 18,739.62 and 7,913.81

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Solution

The fourth proportional to 13,578.60, 18,739.62 and 7,913.81 is: 10,921.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.60 : 18,739.62 = 7,913.81 : x
  2. Step 2: Convert to fraction form
    13,578.60/18,739.62 = 7,913.81/x
  3. Step 3: Cross multiply
    13,578.60x = 18,739.62 × 7,913.81
  4. Step 4: Simplify right side
    13,578.60x = 148,301,792.15
  5. Step 5: Solve for x
    x = 148,301,792.15/13,578.60
  6. Step 6: Final answer
    x = 10,921.73

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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.