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Finding the Fourth Proportional to 13,470.71, 18,607.73 and 12,213.18

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Solution

The fourth proportional to 13,470.71, 18,607.73 and 12,213.18 is: 16,870.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,470.71 : 18,607.73 = 12,213.18 : x
  2. Step 2: Convert to fraction form
    13,470.71/18,607.73 = 12,213.18/x
  3. Step 3: Cross multiply
    13,470.71x = 18,607.73 × 12,213.18
  4. Step 4: Simplify right side
    13,470.71x = 227,259,494.82
  5. Step 5: Solve for x
    x = 227,259,494.82/13,470.71
  6. Step 6: Final answer
    x = 16,870.65

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.