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Finding the Fourth Proportional to 40,742.80, 61,122.80 and 12,662.33

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Solution

The fourth proportional to 40,742.80, 61,122.80 and 12,662.33 is: 18,996.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,742.80 : 61,122.80 = 12,662.33 : x
  2. Step 2: Convert to fraction form
    40,742.80/61,122.80 = 12,662.33/x
  3. Step 3: Cross multiply
    40,742.80x = 61,122.80 × 12,662.33
  4. Step 4: Simplify right side
    40,742.80x = 773,956,790.17
  5. Step 5: Solve for x
    x = 773,956,790.17/40,742.80
  6. Step 6: Final answer
    x = 18,996.16

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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.