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Finding the Fourth Proportional to 28,971.96, 43,464.72 and 8,980.41

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Solution

The fourth proportional to 28,971.96, 43,464.72 and 8,980.41 is: 13,472.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,971.96 : 43,464.72 = 8,980.41 : x
  2. Step 2: Convert to fraction form
    28,971.96/43,464.72 = 8,980.41/x
  3. Step 3: Cross multiply
    28,971.96x = 43,464.72 × 8,980.41
  4. Step 4: Simplify right side
    28,971.96x = 390,331,006.14
  5. Step 5: Solve for x
    x = 390,331,006.14/28,971.96
  6. Step 6: Final answer
    x = 13,472.72

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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.