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Finding the Fourth Proportional to 43,605.80, 65,408.70 and 21,433.40

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Solution

The fourth proportional to 43,605.80, 65,408.70 and 21,433.40 is: 32,150.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,605.80 : 65,408.70 = 21,433.40 : x
  2. Step 2: Convert to fraction form
    43,605.80/65,408.70 = 21,433.40/x
  3. Step 3: Cross multiply
    43,605.80x = 65,408.70 × 21,433.40
  4. Step 4: Simplify right side
    43,605.80x = 1,401,930,830.58
  5. Step 5: Solve for x
    x = 1,401,930,830.58/43,605.80
  6. Step 6: Final answer
    x = 32,150.10

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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.