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Finding the Fourth Proportional to 40,937.40, 61,395.30 and 12,857.40

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Solution

The fourth proportional to 40,937.40, 61,395.30 and 12,857.40 is: 19,282.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,937.40 : 61,395.30 = 12,857.40 : x
  2. Step 2: Convert to fraction form
    40,937.40/61,395.30 = 12,857.40/x
  3. Step 3: Cross multiply
    40,937.40x = 61,395.30 × 12,857.40
  4. Step 4: Simplify right side
    40,937.40x = 789,383,930.22
  5. Step 5: Solve for x
    x = 789,383,930.22/40,937.40
  6. Step 6: Final answer
    x = 19,282.71

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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.