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Finding the Fourth Proportional to 13,376.84, 18,459.72 and 7,408.40

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Solution

The fourth proportional to 13,376.84, 18,459.72 and 7,408.40 is: 10,223.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,376.84 : 18,459.72 = 7,408.40 : x
  2. Step 2: Convert to fraction form
    13,376.84/18,459.72 = 7,408.40/x
  3. Step 3: Cross multiply
    13,376.84x = 18,459.72 × 7,408.40
  4. Step 4: Simplify right side
    13,376.84x = 136,756,989.65
  5. Step 5: Solve for x
    x = 136,756,989.65/13,376.84
  6. Step 6: Final answer
    x = 10,223.42

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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.