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Finding the Fourth Proportional to 13,055.18, 18,018 and 8,591.87

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Solution

The fourth proportional to 13,055.18, 18,018 and 8,591.87 is: 11,858.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,055.18 : 18,018 = 8,591.87 : x
  2. Step 2: Convert to fraction form
    13,055.18/18,018 = 8,591.87/x
  3. Step 3: Cross multiply
    13,055.18x = 18,018 × 8,591.87
  4. Step 4: Simplify right side
    13,055.18x = 154,808,358.71
  5. Step 5: Solve for x
    x = 154,808,358.71/13,055.18
  6. Step 6: Final answer
    x = 11,858.01

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Why These Related Problems?

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