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Finding the Fourth Proportional to 40,672.36, 61,007.82 and 12,970.36

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Solution

The fourth proportional to 40,672.36, 61,007.82 and 12,970.36 is: 19,455.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,672.36 : 61,007.82 = 12,970.36 : x
  2. Step 2: Convert to fraction form
    40,672.36/61,007.82 = 12,970.36/x
  3. Step 3: Cross multiply
    40,672.36x = 61,007.82 × 12,970.36
  4. Step 4: Simplify right side
    40,672.36x = 791,293,388.22
  5. Step 5: Solve for x
    x = 791,293,388.22/40,672.36
  6. Step 6: Final answer
    x = 19,455.31

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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.