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Finding the Fourth Proportional to 28,731.92, 43,055.72 and 14,480.90

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Solution

The fourth proportional to 28,731.92, 43,055.72 and 14,480.90 is: 21,700.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,731.92 : 43,055.72 = 14,480.90 : x
  2. Step 2: Convert to fraction form
    28,731.92/43,055.72 = 14,480.90/x
  3. Step 3: Cross multiply
    28,731.92x = 43,055.72 × 14,480.90
  4. Step 4: Simplify right side
    28,731.92x = 623,485,575.75
  5. Step 5: Solve for x
    x = 623,485,575.75/28,731.92
  6. Step 6: Final answer
    x = 21,700.10

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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.