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Finding the Fourth Proportional to 12,618.81, 18,830.99 and 11,083.05

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Solution

The fourth proportional to 12,618.81, 18,830.99 and 11,083.05 is: 16,539.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.81 : 18,830.99 = 11,083.05 : x
  2. Step 2: Convert to fraction form
    12,618.81/18,830.99 = 11,083.05/x
  3. Step 3: Cross multiply
    12,618.81x = 18,830.99 × 11,083.05
  4. Step 4: Simplify right side
    12,618.81x = 208,704,831.43
  5. Step 5: Solve for x
    x = 208,704,831.43/12,618.81
  6. Step 6: Final answer
    x = 16,539.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.