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Finding the Fourth Proportional to 19,916.58, 29,860.90 and 8,817.26

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Solution

The fourth proportional to 19,916.58, 29,860.90 and 8,817.26 is: 13,219.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,916.58 : 29,860.90 = 8,817.26 : x
  2. Step 2: Convert to fraction form
    19,916.58/29,860.90 = 8,817.26/x
  3. Step 3: Cross multiply
    19,916.58x = 29,860.90 × 8,817.26
  4. Step 4: Simplify right side
    19,916.58x = 263,291,197.38
  5. Step 5: Solve for x
    x = 263,291,197.38/19,916.58
  6. Step 6: Final answer
    x = 13,219.70

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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.