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Finding the Fourth Proportional to 13,468.08, 18,586.08 and 7,878

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Solution

The fourth proportional to 13,468.08, 18,586.08 and 7,878 is: 10,871.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,468.08 : 18,586.08 = 7,878 : x
  2. Step 2: Convert to fraction form
    13,468.08/18,586.08 = 7,878/x
  3. Step 3: Cross multiply
    13,468.08x = 18,586.08 × 7,878
  4. Step 4: Simplify right side
    13,468.08x = 146,421,138.24
  5. Step 5: Solve for x
    x = 146,421,138.24/13,468.08
  6. Step 6: Final answer
    x = 10,871.72

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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.