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Finding the Fourth Proportional to 12,488.78, 17,234.78 and 6,823.64

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Solution

The fourth proportional to 12,488.78, 17,234.78 and 6,823.64 is: 9,416.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,488.78 : 17,234.78 = 6,823.64 : x
  2. Step 2: Convert to fraction form
    12,488.78/17,234.78 = 6,823.64/x
  3. Step 3: Cross multiply
    12,488.78x = 17,234.78 × 6,823.64
  4. Step 4: Simplify right side
    12,488.78x = 117,603,943.17
  5. Step 5: Solve for x
    x = 117,603,943.17/12,488.78
  6. Step 6: Final answer
    x = 9,416.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.