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Finding the Fourth Proportional to 19,916.55, 29,860.95 and 8,817.22

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Solution

The fourth proportional to 19,916.55, 29,860.95 and 8,817.22 is: 13,219.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,916.55 : 29,860.95 = 8,817.22 : x
  2. Step 2: Convert to fraction form
    19,916.55/29,860.95 = 8,817.22/x
  3. Step 3: Cross multiply
    19,916.55x = 29,860.95 × 8,817.22
  4. Step 4: Simplify right side
    19,916.55x = 263,290,635.95
  5. Step 5: Solve for x
    x = 263,290,635.95/19,916.55
  6. Step 6: Final answer
    x = 13,219.69

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1.5x scale

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.