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Finding the Fourth Proportional to 28,916.40, 43,374.60 and 11,377.20

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Solution

The fourth proportional to 28,916.40, 43,374.60 and 11,377.20 is: 17,065.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,916.40 : 43,374.60 = 11,377.20 : x
  2. Step 2: Convert to fraction form
    28,916.40/43,374.60 = 11,377.20/x
  3. Step 3: Cross multiply
    28,916.40x = 43,374.60 × 11,377.20
  4. Step 4: Simplify right side
    28,916.40x = 493,481,499.12
  5. Step 5: Solve for x
    x = 493,481,499.12/28,916.40
  6. Step 6: Final answer
    x = 17,065.80

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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.