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Finding the Fourth Proportional to 13,165.70, 18,168.65 and 7,579.94

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Solution

The fourth proportional to 13,165.70, 18,168.65 and 7,579.94 is: 10,460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,165.70 : 18,168.65 = 7,579.94 : x
  2. Step 2: Convert to fraction form
    13,165.70/18,168.65 = 7,579.94/x
  3. Step 3: Cross multiply
    13,165.70x = 18,168.65 × 7,579.94
  4. Step 4: Simplify right side
    13,165.70x = 137,717,148.14
  5. Step 5: Solve for x
    x = 137,717,148.14/13,165.70
  6. Step 6: Final answer
    x = 10,460.30

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1.5x scale

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.