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Finding the Fourth Proportional to 19,163.28, 28,727.88 and 7,484.68

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Solution

The fourth proportional to 19,163.28, 28,727.88 and 7,484.68 is: 11,220.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,163.28 : 28,727.88 = 7,484.68 : x
  2. Step 2: Convert to fraction form
    19,163.28/28,727.88 = 7,484.68/x
  3. Step 3: Cross multiply
    19,163.28x = 28,727.88 × 7,484.68
  4. Step 4: Simplify right side
    19,163.28x = 215,018,988.88
  5. Step 5: Solve for x
    x = 215,018,988.88/19,163.28
  6. Step 6: Final answer
    x = 11,220.36

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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.