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Finding the Fourth Proportional to 13,145.16, 18,138.42 and 7,555.08

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Solution

The fourth proportional to 13,145.16, 18,138.42 and 7,555.08 is: 10,424.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.16 : 18,138.42 = 7,555.08 : x
  2. Step 2: Convert to fraction form
    13,145.16/18,138.42 = 7,555.08/x
  3. Step 3: Cross multiply
    13,145.16x = 18,138.42 × 7,555.08
  4. Step 4: Simplify right side
    13,145.16x = 137,037,214.17
  5. Step 5: Solve for x
    x = 137,037,214.17/13,145.16
  6. Step 6: Final answer
    x = 10,424.92

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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.