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Finding the Fourth Proportional to 13,668.78, 18,864.30 and 8,367.10

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Solution

The fourth proportional to 13,668.78, 18,864.30 and 8,367.10 is: 11,547.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.78 : 18,864.30 = 8,367.10 : x
  2. Step 2: Convert to fraction form
    13,668.78/18,864.30 = 8,367.10/x
  3. Step 3: Cross multiply
    13,668.78x = 18,864.30 × 8,367.10
  4. Step 4: Simplify right side
    13,668.78x = 157,839,484.53
  5. Step 5: Solve for x
    x = 157,839,484.53/13,668.78
  6. Step 6: Final answer
    x = 11,547.44

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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.