Home / 21,181.19-31,774.53-6,391.59

Finding the Fourth Proportional to 21,181.19, 31,774.53 and 6,391.59

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Solution

The fourth proportional to 21,181.19, 31,774.53 and 6,391.59 is: 9,588.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.19 : 31,774.53 = 6,391.59 : x
  2. Step 2: Convert to fraction form
    21,181.19/31,774.53 = 6,391.59/x
  3. Step 3: Cross multiply
    21,181.19x = 31,774.53 × 6,391.59
  4. Step 4: Simplify right side
    21,181.19x = 203,089,768.20
  5. Step 5: Solve for x
    x = 203,089,768.20/21,181.19
  6. Step 6: Final answer
    x = 9,588.22

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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.