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Finding the Fourth Proportional to 43,859.20, 65,745.60 and 21,654.40

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Solution

The fourth proportional to 43,859.20, 65,745.60 and 21,654.40 is: 32,460.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,859.20 : 65,745.60 = 21,654.40 : x
  2. Step 2: Convert to fraction form
    43,859.20/65,745.60 = 21,654.40/x
  3. Step 3: Cross multiply
    43,859.20x = 65,745.60 × 21,654.40
  4. Step 4: Simplify right side
    43,859.20x = 1,423,681,520.64
  5. Step 5: Solve for x
    x = 1,423,681,520.64/43,859.20
  6. Step 6: Final answer
    x = 32,460.27

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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.