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Finding the Fourth Proportional to 56,517.81, 84,774.03 and 20,986.20

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Solution

The fourth proportional to 56,517.81, 84,774.03 and 20,986.20 is: 31,478.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,517.81 : 84,774.03 = 20,986.20 : x
  2. Step 2: Convert to fraction form
    56,517.81/84,774.03 = 20,986.20/x
  3. Step 3: Cross multiply
    56,517.81x = 84,774.03 × 20,986.20
  4. Step 4: Simplify right side
    56,517.81x = 1,779,084,748.39
  5. Step 5: Solve for x
    x = 1,779,084,748.39/56,517.81
  6. Step 6: Final answer
    x = 31,478.30

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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.