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Finding the Fourth Proportional to 21,757.53, 32,638.56 and 9,278.87

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Solution

The fourth proportional to 21,757.53, 32,638.56 and 9,278.87 is: 13,919.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,757.53 : 32,638.56 = 9,278.87 : x
  2. Step 2: Convert to fraction form
    21,757.53/32,638.56 = 9,278.87/x
  3. Step 3: Cross multiply
    21,757.53x = 32,638.56 × 9,278.87
  4. Step 4: Simplify right side
    21,757.53x = 302,848,955.23
  5. Step 5: Solve for x
    x = 302,848,955.23/21,757.53
  6. Step 6: Final answer
    x = 13,919.27

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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.