Home / 20,760.40-31,140.60-12,012.40

Finding the Fourth Proportional to 20,760.40, 31,140.60 and 12,012.40

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Solution

The fourth proportional to 20,760.40, 31,140.60 and 12,012.40 is: 18,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.40 : 31,140.60 = 12,012.40 : x
  2. Step 2: Convert to fraction form
    20,760.40/31,140.60 = 12,012.40/x
  3. Step 3: Cross multiply
    20,760.40x = 31,140.60 × 12,012.40
  4. Step 4: Simplify right side
    20,760.40x = 374,073,343.44
  5. Step 5: Solve for x
    x = 374,073,343.44/20,760.40
  6. Step 6: Final answer
    x = 18,018.60

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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.