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Finding the Fourth Proportional to 13,479.84, 18,603.96 and 8,174.64

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Solution

The fourth proportional to 13,479.84, 18,603.96 and 8,174.64 is: 11,282.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.84 : 18,603.96 = 8,174.64 : x
  2. Step 2: Convert to fraction form
    13,479.84/18,603.96 = 8,174.64/x
  3. Step 3: Cross multiply
    13,479.84x = 18,603.96 × 8,174.64
  4. Step 4: Simplify right side
    13,479.84x = 152,080,675.57
  5. Step 5: Solve for x
    x = 152,080,675.57/13,479.84
  6. Step 6: Final answer
    x = 11,282.08

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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.