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Finding the Fourth Proportional to 13,808.79, 19,056.35 and 7,840.62

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Solution

The fourth proportional to 13,808.79, 19,056.35 and 7,840.62 is: 10,820.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.79 : 19,056.35 = 7,840.62 : x
  2. Step 2: Convert to fraction form
    13,808.79/19,056.35 = 7,840.62/x
  3. Step 3: Cross multiply
    13,808.79x = 19,056.35 × 7,840.62
  4. Step 4: Simplify right side
    13,808.79x = 149,413,618.54
  5. Step 5: Solve for x
    x = 149,413,618.54/13,808.79
  6. Step 6: Final answer
    x = 10,820.18

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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.