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Finding the Fourth Proportional to 12,345.90, 18,506.70 and 11,033.70

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Solution

The fourth proportional to 12,345.90, 18,506.70 and 11,033.70 is: 16,539.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.90 : 18,506.70 = 11,033.70 : x
  2. Step 2: Convert to fraction form
    12,345.90/18,506.70 = 11,033.70/x
  3. Step 3: Cross multiply
    12,345.90x = 18,506.70 × 11,033.70
  4. Step 4: Simplify right side
    12,345.90x = 204,197,375.79
  5. Step 5: Solve for x
    x = 204,197,375.79/12,345.90
  6. Step 6: Final answer
    x = 16,539.69

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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.