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Finding the Fourth Proportional to 28,939, 43,392.86 and 15,619.16

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Solution

The fourth proportional to 28,939, 43,392.86 and 15,619.16 is: 23,420.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,939 : 43,392.86 = 15,619.16 : x
  2. Step 2: Convert to fraction form
    28,939/43,392.86 = 15,619.16/x
  3. Step 3: Cross multiply
    28,939x = 43,392.86 × 15,619.16
  4. Step 4: Simplify right side
    28,939x = 677,760,023.20
  5. Step 5: Solve for x
    x = 677,760,023.20/28,939
  6. Step 6: Final answer
    x = 23,420.30

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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.