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Finding the Fourth Proportional to 40,681.56, 61,023.44 and 12,979.56

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Solution

The fourth proportional to 40,681.56, 61,023.44 and 12,979.56 is: 19,469.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,681.56 : 61,023.44 = 12,979.56 : x
  2. Step 2: Convert to fraction form
    40,681.56/61,023.44 = 12,979.56/x
  3. Step 3: Cross multiply
    40,681.56x = 61,023.44 × 12,979.56
  4. Step 4: Simplify right side
    40,681.56x = 792,057,400.89
  5. Step 5: Solve for x
    x = 792,057,400.89/40,681.56
  6. Step 6: Final answer
    x = 19,469.69

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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.