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Finding the Fourth Proportional to 43,790.70, 65,686.05 and 12,200.70

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Solution

The fourth proportional to 43,790.70, 65,686.05 and 12,200.70 is: 18,301.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,790.70 : 65,686.05 = 12,200.70 : x
  2. Step 2: Convert to fraction form
    43,790.70/65,686.05 = 12,200.70/x
  3. Step 3: Cross multiply
    43,790.70x = 65,686.05 × 12,200.70
  4. Step 4: Simplify right side
    43,790.70x = 801,415,790.24
  5. Step 5: Solve for x
    x = 801,415,790.24/43,790.70
  6. Step 6: Final answer
    x = 18,301.05

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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.