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Finding the Fourth Proportional to 43,679.70, 65,519.55 and 12,089.70

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Solution

The fourth proportional to 43,679.70, 65,519.55 and 12,089.70 is: 18,134.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,679.70 : 65,519.55 = 12,089.70 : x
  2. Step 2: Convert to fraction form
    43,679.70/65,519.55 = 12,089.70/x
  3. Step 3: Cross multiply
    43,679.70x = 65,519.55 × 12,089.70
  4. Step 4: Simplify right side
    43,679.70x = 792,111,703.64
  5. Step 5: Solve for x
    x = 792,111,703.64/43,679.70
  6. Step 6: Final answer
    x = 18,134.55

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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.