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Finding the Fourth Proportional to 12,169.78, 18,246.83 and 4,774.99

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Solution

The fourth proportional to 12,169.78, 18,246.83 and 4,774.99 is: 7,159.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,169.78 : 18,246.83 = 4,774.99 : x
  2. Step 2: Convert to fraction form
    12,169.78/18,246.83 = 4,774.99/x
  3. Step 3: Cross multiply
    12,169.78x = 18,246.83 × 4,774.99
  4. Step 4: Simplify right side
    12,169.78x = 87,128,404.46
  5. Step 5: Solve for x
    x = 87,128,404.46/12,169.78
  6. Step 6: Final answer
    x = 7,159.40

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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.