Home / 11,231.40-16,836.30-8,731.20

Finding the Fourth Proportional to 11,231.40, 16,836.30 and 8,731.20

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Solution

The fourth proportional to 11,231.40, 16,836.30 and 8,731.20 is: 13,088.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,231.40 : 16,836.30 = 8,731.20 : x
  2. Step 2: Convert to fraction form
    11,231.40/16,836.30 = 8,731.20/x
  3. Step 3: Cross multiply
    11,231.40x = 16,836.30 × 8,731.20
  4. Step 4: Simplify right side
    11,231.40x = 147,001,102.56
  5. Step 5: Solve for x
    x = 147,001,102.56/11,231.40
  6. Step 6: Final answer
    x = 13,088.40

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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.