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Finding the Fourth Proportional to 28,162.49, 42,250.11 and 11,520.33

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Solution

The fourth proportional to 28,162.49, 42,250.11 and 11,520.33 is: 17,283.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,162.49 : 42,250.11 = 11,520.33 : x
  2. Step 2: Convert to fraction form
    28,162.49/42,250.11 = 11,520.33/x
  3. Step 3: Cross multiply
    28,162.49x = 42,250.11 × 11,520.33
  4. Step 4: Simplify right side
    28,162.49x = 486,735,008.10
  5. Step 5: Solve for x
    x = 486,735,008.10/28,162.49
  6. Step 6: Final answer
    x = 17,283.10

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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.