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Finding the Fourth Proportional to 17,113.70, 25,668.15 and 5,428.10

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Solution

The fourth proportional to 17,113.70, 25,668.15 and 5,428.10 is: 8,141.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,113.70 : 25,668.15 = 5,428.10 : x
  2. Step 2: Convert to fraction form
    17,113.70/25,668.15 = 5,428.10/x
  3. Step 3: Cross multiply
    17,113.70x = 25,668.15 × 5,428.10
  4. Step 4: Simplify right side
    17,113.70x = 139,329,285.02
  5. Step 5: Solve for x
    x = 139,329,285.02/17,113.70
  6. Step 6: Final answer
    x = 8,141.39

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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.