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Finding the Fourth Proportional to 20,535.60, 30,803.40 and 13,974.60

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Solution

The fourth proportional to 20,535.60, 30,803.40 and 13,974.60 is: 20,961.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,535.60 : 30,803.40 = 13,974.60 : x
  2. Step 2: Convert to fraction form
    20,535.60/30,803.40 = 13,974.60/x
  3. Step 3: Cross multiply
    20,535.60x = 30,803.40 × 13,974.60
  4. Step 4: Simplify right side
    20,535.60x = 430,465,193.64
  5. Step 5: Solve for x
    x = 430,465,193.64/20,535.60
  6. Step 6: Final answer
    x = 20,961.90

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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.