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Finding the Fourth Proportional to 56,490.59, 84,683.56 and 20,932.09

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Solution

The fourth proportional to 56,490.59, 84,683.56 and 20,932.09 is: 31,378.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,490.59 : 84,683.56 = 20,932.09 : x
  2. Step 2: Convert to fraction form
    56,490.59/84,683.56 = 20,932.09/x
  3. Step 3: Cross multiply
    56,490.59x = 84,683.56 × 20,932.09
  4. Step 4: Simplify right side
    56,490.59x = 1,772,603,899.44
  5. Step 5: Solve for x
    x = 1,772,603,899.44/56,490.59
  6. Step 6: Final answer
    x = 31,378.75

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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.