Home / 28,138.32-42,191.89-11,510.03

Finding the Fourth Proportional to 28,138.32, 42,191.89 and 11,510.03

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Solution

The fourth proportional to 28,138.32, 42,191.89 and 11,510.03 is: 17,258.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138.32 : 42,191.89 = 11,510.03 : x
  2. Step 2: Convert to fraction form
    28,138.32/42,191.89 = 11,510.03/x
  3. Step 3: Cross multiply
    28,138.32x = 42,191.89 × 11,510.03
  4. Step 4: Simplify right side
    28,138.32x = 485,629,919.66
  5. Step 5: Solve for x
    x = 485,629,919.66/28,138.32
  6. Step 6: Final answer
    x = 17,258.67

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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.