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Finding the Fourth Proportional to 29,368.71, 40,528.94 and 15,939.98

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Solution

The fourth proportional to 29,368.71, 40,528.94 and 15,939.98 is: 21,997.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,368.71 : 40,528.94 = 15,939.98 : x
  2. Step 2: Convert to fraction form
    29,368.71/40,528.94 = 15,939.98/x
  3. Step 3: Cross multiply
    29,368.71x = 40,528.94 × 15,939.98
  4. Step 4: Simplify right side
    29,368.71x = 646,030,413.32
  5. Step 5: Solve for x
    x = 646,030,413.32/29,368.71
  6. Step 6: Final answer
    x = 21,997.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.