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Finding the Fourth Proportional to 28,398.74, 42,600.42 and 11,755.67

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Solution

The fourth proportional to 28,398.74, 42,600.42 and 11,755.67 is: 17,634.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,398.74 : 42,600.42 = 11,755.67 : x
  2. Step 2: Convert to fraction form
    28,398.74/42,600.42 = 11,755.67/x
  3. Step 3: Cross multiply
    28,398.74x = 42,600.42 × 11,755.67
  4. Step 4: Simplify right side
    28,398.74x = 500,796,266.38
  5. Step 5: Solve for x
    x = 500,796,266.38/28,398.74
  6. Step 6: Final answer
    x = 17,634.46

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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.