Home / 20,146.40-30,195.30-10,280.60

Finding the Fourth Proportional to 20,146.40, 30,195.30 and 10,280.60

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Solution

The fourth proportional to 20,146.40, 30,195.30 and 10,280.60 is: 15,408.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,146.40 : 30,195.30 = 10,280.60 : x
  2. Step 2: Convert to fraction form
    20,146.40/30,195.30 = 10,280.60/x
  3. Step 3: Cross multiply
    20,146.40x = 30,195.30 × 10,280.60
  4. Step 4: Simplify right side
    20,146.40x = 310,425,801.18
  5. Step 5: Solve for x
    x = 310,425,801.18/20,146.40
  6. Step 6: Final answer
    x = 15,408.50

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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.