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Finding the Fourth Proportional to 40,920.30, 61,368.30 and 15,945.98

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Solution

The fourth proportional to 40,920.30, 61,368.30 and 15,945.98 is: 23,914.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,920.30 : 61,368.30 = 15,945.98 : x
  2. Step 2: Convert to fraction form
    40,920.30/61,368.30 = 15,945.98/x
  3. Step 3: Cross multiply
    40,920.30x = 61,368.30 × 15,945.98
  4. Step 4: Simplify right side
    40,920.30x = 978,577,377.59
  5. Step 5: Solve for x
    x = 978,577,377.59/40,920.30
  6. Step 6: Final answer
    x = 23,914.23

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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.