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Finding the Fourth Proportional to 21,720.76, 32,586.76 and 6,138.39

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Solution

The fourth proportional to 21,720.76, 32,586.76 and 6,138.39 is: 9,209.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.76 : 32,586.76 = 6,138.39 : x
  2. Step 2: Convert to fraction form
    21,720.76/32,586.76 = 6,138.39/x
  3. Step 3: Cross multiply
    21,720.76x = 32,586.76 × 6,138.39
  4. Step 4: Simplify right side
    21,720.76x = 200,030,241.72
  5. Step 5: Solve for x
    x = 200,030,241.72/21,720.76
  6. Step 6: Final answer
    x = 9,209.17

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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.