Home / 21,939.90-32,912.60-7,144.84

Finding the Fourth Proportional to 21,939.90, 32,912.60 and 7,144.84

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Solution

The fourth proportional to 21,939.90, 32,912.60 and 7,144.84 is: 10,718.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.90 : 32,912.60 = 7,144.84 : x
  2. Step 2: Convert to fraction form
    21,939.90/32,912.60 = 7,144.84/x
  3. Step 3: Cross multiply
    21,939.90x = 32,912.60 × 7,144.84
  4. Step 4: Simplify right side
    21,939.90x = 235,155,266.40
  5. Step 5: Solve for x
    x = 235,155,266.40/21,939.90
  6. Step 6: Final answer
    x = 10,718.16

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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.