Home / 21,181.96-31,771.58-8,698.76

Finding the Fourth Proportional to 21,181.96, 31,771.58 and 8,698.76

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Solution

The fourth proportional to 21,181.96, 31,771.58 and 8,698.76 is: 13,047.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.96 : 31,771.58 = 8,698.76 : x
  2. Step 2: Convert to fraction form
    21,181.96/31,771.58 = 8,698.76/x
  3. Step 3: Cross multiply
    21,181.96x = 31,771.58 × 8,698.76
  4. Step 4: Simplify right side
    21,181.96x = 276,373,349.24
  5. Step 5: Solve for x
    x = 276,373,349.24/21,181.96
  6. Step 6: Final answer
    x = 13,047.58

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1.5x scale

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.