Home / 19,512.40-29,268.60-12,139.60

Finding the Fourth Proportional to 19,512.40, 29,268.60 and 12,139.60

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Solution

The fourth proportional to 19,512.40, 29,268.60 and 12,139.60 is: 18,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,512.40 : 29,268.60 = 12,139.60 : x
  2. Step 2: Convert to fraction form
    19,512.40/29,268.60 = 12,139.60/x
  3. Step 3: Cross multiply
    19,512.40x = 29,268.60 × 12,139.60
  4. Step 4: Simplify right side
    19,512.40x = 355,309,096.56
  5. Step 5: Solve for x
    x = 355,309,096.56/19,512.40
  6. Step 6: Final answer
    x = 18,209.40

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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.