Home / 20,878.95-31,322.86-6,837.94

Finding the Fourth Proportional to 20,878.95, 31,322.86 and 6,837.94

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Solution

The fourth proportional to 20,878.95, 31,322.86 and 6,837.94 is: 10,258.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.95 : 31,322.86 = 6,837.94 : x
  2. Step 2: Convert to fraction form
    20,878.95/31,322.86 = 6,837.94/x
  3. Step 3: Cross multiply
    20,878.95x = 31,322.86 × 6,837.94
  4. Step 4: Simplify right side
    20,878.95x = 214,183,837.31
  5. Step 5: Solve for x
    x = 214,183,837.31/20,878.95
  6. Step 6: Final answer
    x = 10,258.36

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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.