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Finding the Fourth Proportional to 12,847.70, 18,012.70 and 12,847.70

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Solution

The fourth proportional to 12,847.70, 18,012.70 and 12,847.70 is: 18,012.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,847.70 : 18,012.70 = 12,847.70 : x
  2. Step 2: Convert to fraction form
    12,847.70/18,012.70 = 12,847.70/x
  3. Step 3: Cross multiply
    12,847.70x = 18,012.70 × 12,847.70
  4. Step 4: Simplify right side
    12,847.70x = 231,421,765.79
  5. Step 5: Solve for x
    x = 231,421,765.79/12,847.70
  6. Step 6: Final answer
    x = 18,012.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.