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Finding the Fourth Proportional to 20,212.60, 30,311.70 and 7,065.40

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Solution

The fourth proportional to 20,212.60, 30,311.70 and 7,065.40 is: 10,595.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212.60 : 30,311.70 = 7,065.40 : x
  2. Step 2: Convert to fraction form
    20,212.60/30,311.70 = 7,065.40/x
  3. Step 3: Cross multiply
    20,212.60x = 30,311.70 × 7,065.40
  4. Step 4: Simplify right side
    20,212.60x = 214,164,285.18
  5. Step 5: Solve for x
    x = 214,164,285.18/20,212.60
  6. Step 6: Final answer
    x = 10,595.58

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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.