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Finding the Fourth Proportional to 28,415.82, 42,615.09 and 9,943.50

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Solution

The fourth proportional to 28,415.82, 42,615.09 and 9,943.50 is: 14,912.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.82 : 42,615.09 = 9,943.50 : x
  2. Step 2: Convert to fraction form
    28,415.82/42,615.09 = 9,943.50/x
  3. Step 3: Cross multiply
    28,415.82x = 42,615.09 × 9,943.50
  4. Step 4: Simplify right side
    28,415.82x = 423,743,147.42
  5. Step 5: Solve for x
    x = 423,743,147.42/28,415.82
  6. Step 6: Final answer
    x = 14,912.23

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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.