Home / 21,912.60-32,825.70-13,121.40

Finding the Fourth Proportional to 21,912.60, 32,825.70 and 13,121.40

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Solution

The fourth proportional to 21,912.60, 32,825.70 and 13,121.40 is: 19,656.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.60 : 32,825.70 = 13,121.40 : x
  2. Step 2: Convert to fraction form
    21,912.60/32,825.70 = 13,121.40/x
  3. Step 3: Cross multiply
    21,912.60x = 32,825.70 × 13,121.40
  4. Step 4: Simplify right side
    21,912.60x = 430,719,139.98
  5. Step 5: Solve for x
    x = 430,719,139.98/21,912.60
  6. Step 6: Final answer
    x = 19,656.23

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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.