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Finding the Fourth Proportional to 12,617.70, 18,926.55 and 11,208.30

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Solution

The fourth proportional to 12,617.70, 18,926.55 and 11,208.30 is: 16,812.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,617.70 : 18,926.55 = 11,208.30 : x
  2. Step 2: Convert to fraction form
    12,617.70/18,926.55 = 11,208.30/x
  3. Step 3: Cross multiply
    12,617.70x = 18,926.55 × 11,208.30
  4. Step 4: Simplify right side
    12,617.70x = 212,134,450.37
  5. Step 5: Solve for x
    x = 212,134,450.37/12,617.70
  6. Step 6: Final answer
    x = 16,812.45

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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.