Home / 21,181.98-31,777.11-6,390.30

Finding the Fourth Proportional to 21,181.98, 31,777.11 and 6,390.30

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Solution

The fourth proportional to 21,181.98, 31,777.11 and 6,390.30 is: 9,586.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.98 : 31,777.11 = 6,390.30 : x
  2. Step 2: Convert to fraction form
    21,181.98/31,777.11 = 6,390.30/x
  3. Step 3: Cross multiply
    21,181.98x = 31,777.11 × 6,390.30
  4. Step 4: Simplify right side
    21,181.98x = 203,065,266.03
  5. Step 5: Solve for x
    x = 203,065,266.03/21,181.98
  6. Step 6: Final answer
    x = 9,586.70

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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.