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Finding the Fourth Proportional to 13,665.44, 18,864.24 and 8,697.44

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Solution

The fourth proportional to 13,665.44, 18,864.24 and 8,697.44 is: 12,006.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,665.44 : 18,864.24 = 8,697.44 : x
  2. Step 2: Convert to fraction form
    13,665.44/18,864.24 = 8,697.44/x
  3. Step 3: Cross multiply
    13,665.44x = 18,864.24 × 8,697.44
  4. Step 4: Simplify right side
    13,665.44x = 164,070,595.55
  5. Step 5: Solve for x
    x = 164,070,595.55/13,665.44
  6. Step 6: Final answer
    x = 12,006.24

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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.