Home / 28,540.36-42,792.32-13,719.79

Finding the Fourth Proportional to 28,540.36, 42,792.32 and 13,719.79

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Solution

The fourth proportional to 28,540.36, 42,792.32 and 13,719.79 is: 20,570.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,540.36 : 42,792.32 = 13,719.79 : x
  2. Step 2: Convert to fraction form
    28,540.36/42,792.32 = 13,719.79/x
  3. Step 3: Cross multiply
    28,540.36x = 42,792.32 × 13,719.79
  4. Step 4: Simplify right side
    28,540.36x = 587,101,575.41
  5. Step 5: Solve for x
    x = 587,101,575.41/28,540.36
  6. Step 6: Final answer
    x = 20,570.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.