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Finding the Fourth Proportional to 12,173.68, 18,303.99 and 11,211.40

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Solution

The fourth proportional to 12,173.68, 18,303.99 and 11,211.40 is: 16,857.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,173.68 : 18,303.99 = 11,211.40 : x
  2. Step 2: Convert to fraction form
    12,173.68/18,303.99 = 11,211.40/x
  3. Step 3: Cross multiply
    12,173.68x = 18,303.99 × 11,211.40
  4. Step 4: Simplify right side
    12,173.68x = 205,213,353.49
  5. Step 5: Solve for x
    x = 205,213,353.49/12,173.68
  6. Step 6: Final answer
    x = 16,857.13

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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.