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Finding the Fourth Proportional to 40,960.70, 61,393.09 and 15,643.63

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Solution

The fourth proportional to 40,960.70, 61,393.09 and 15,643.63 is: 23,447.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,960.70 : 61,393.09 = 15,643.63 : x
  2. Step 2: Convert to fraction form
    40,960.70/61,393.09 = 15,643.63/x
  3. Step 3: Cross multiply
    40,960.70x = 61,393.09 × 15,643.63
  4. Step 4: Simplify right side
    40,960.70x = 960,410,784.52
  5. Step 5: Solve for x
    x = 960,410,784.52/40,960.70
  6. Step 6: Final answer
    x = 23,447.13

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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.