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Finding the Fourth Proportional to 43,805.70, 65,708.55 and 18,857.70

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Solution

The fourth proportional to 43,805.70, 65,708.55 and 18,857.70 is: 28,286.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,805.70 : 65,708.55 = 18,857.70 : x
  2. Step 2: Convert to fraction form
    43,805.70/65,708.55 = 18,857.70/x
  3. Step 3: Cross multiply
    43,805.70x = 65,708.55 × 18,857.70
  4. Step 4: Simplify right side
    43,805.70x = 1,239,112,123.34
  5. Step 5: Solve for x
    x = 1,239,112,123.34/43,805.70
  6. Step 6: Final answer
    x = 28,286.55

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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.