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Finding the Fourth Proportional to 19,316.64, 28,954.08 and 8,221.44

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Solution

The fourth proportional to 19,316.64, 28,954.08 and 8,221.44 is: 12,323.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,316.64 : 28,954.08 = 8,221.44 : x
  2. Step 2: Convert to fraction form
    19,316.64/28,954.08 = 8,221.44/x
  3. Step 3: Cross multiply
    19,316.64x = 28,954.08 × 8,221.44
  4. Step 4: Simplify right side
    19,316.64x = 238,044,231.48
  5. Step 5: Solve for x
    x = 238,044,231.48/19,316.64
  6. Step 6: Final answer
    x = 12,323.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.