Home / 13,258.86-19,878.30-11,431.50

Finding the Fourth Proportional to 13,258.86, 19,878.30 and 11,431.50

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Solution

The fourth proportional to 13,258.86, 19,878.30 and 11,431.50 is: 17,138.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,258.86 : 19,878.30 = 11,431.50 : x
  2. Step 2: Convert to fraction form
    13,258.86/19,878.30 = 11,431.50/x
  3. Step 3: Cross multiply
    13,258.86x = 19,878.30 × 11,431.50
  4. Step 4: Simplify right side
    13,258.86x = 227,238,786.45
  5. Step 5: Solve for x
    x = 227,238,786.45/13,258.86
  6. Step 6: Final answer
    x = 17,138.64

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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.