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Finding the Fourth Proportional to 12,455.85, 17,307.03 and 12,325.85

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Solution

The fourth proportional to 12,455.85, 17,307.03 and 12,325.85 is: 17,126.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.85 : 17,307.03 = 12,325.85 : x
  2. Step 2: Convert to fraction form
    12,455.85/17,307.03 = 12,325.85/x
  3. Step 3: Cross multiply
    12,455.85x = 17,307.03 × 12,325.85
  4. Step 4: Simplify right side
    12,455.85x = 213,323,769.19
  5. Step 5: Solve for x
    x = 213,323,769.19/12,455.85
  6. Step 6: Final answer
    x = 17,126.39

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Double scale
Find fourth proportional to 12,456.85, 17,308.42 and 12,326.85
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.