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Finding the Fourth Proportional to 43,903.80, 65,863.80 and 12,738.24

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Solution

The fourth proportional to 43,903.80, 65,863.80 and 12,738.24 is: 19,109.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,903.80 : 65,863.80 = 12,738.24 : x
  2. Step 2: Convert to fraction form
    43,903.80/65,863.80 = 12,738.24/x
  3. Step 3: Cross multiply
    43,903.80x = 65,863.80 × 12,738.24
  4. Step 4: Simplify right side
    43,903.80x = 838,988,891.71
  5. Step 5: Solve for x
    x = 838,988,891.71/43,903.80
  6. Step 6: Final answer
    x = 19,109.71

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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.