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Finding the Fourth Proportional to 56,398, 84,598.36 and 18,958.56

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Solution

The fourth proportional to 56,398, 84,598.36 and 18,958.56 is: 28,438.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,398 : 84,598.36 = 18,958.56 : x
  2. Step 2: Convert to fraction form
    56,398/84,598.36 = 18,958.56/x
  3. Step 3: Cross multiply
    56,398x = 84,598.36 × 18,958.56
  4. Step 4: Simplify right side
    56,398x = 1,603,863,083.96
  5. Step 5: Solve for x
    x = 1,603,863,083.96/56,398
  6. Step 6: Final answer
    x = 28,438.30

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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.