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Finding the Fourth Proportional to 28,938.21, 43,410.50 and 9,212.15

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Solution

The fourth proportional to 28,938.21, 43,410.50 and 9,212.15 is: 13,819.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,938.21 : 43,410.50 = 9,212.15 : x
  2. Step 2: Convert to fraction form
    28,938.21/43,410.50 = 9,212.15/x
  3. Step 3: Cross multiply
    28,938.21x = 43,410.50 × 9,212.15
  4. Step 4: Simplify right side
    28,938.21x = 399,903,774.46
  5. Step 5: Solve for x
    x = 399,903,774.46/28,938.21
  6. Step 6: Final answer
    x = 13,819.23

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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.