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Finding the Fourth Proportional to 43,456.40, 65,191.80 and 18,508.40

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Solution

The fourth proportional to 43,456.40, 65,191.80 and 18,508.40 is: 27,765.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,456.40 : 65,191.80 = 18,508.40 : x
  2. Step 2: Convert to fraction form
    43,456.40/65,191.80 = 18,508.40/x
  3. Step 3: Cross multiply
    43,456.40x = 65,191.80 × 18,508.40
  4. Step 4: Simplify right side
    43,456.40x = 1,206,595,911.12
  5. Step 5: Solve for x
    x = 1,206,595,911.12/43,456.40
  6. Step 6: Final answer
    x = 27,765.67

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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.