Home / 21,181.64-31,770.90-8,698.28

Finding the Fourth Proportional to 21,181.64, 31,770.90 and 8,698.28

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Solution

The fourth proportional to 21,181.64, 31,770.90 and 8,698.28 is: 13,046.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.64 : 31,770.90 = 8,698.28 : x
  2. Step 2: Convert to fraction form
    21,181.64/31,770.90 = 8,698.28/x
  3. Step 3: Cross multiply
    21,181.64x = 31,770.90 × 8,698.28
  4. Step 4: Simplify right side
    21,181.64x = 276,352,025.20
  5. Step 5: Solve for x
    x = 276,352,025.20/21,181.64
  6. Step 6: Final answer
    x = 13,046.77

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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.