Home / 21,593.12-29,795.85-12,638.57

Finding the Fourth Proportional to 21,593.12, 29,795.85 and 12,638.57

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Solution

The fourth proportional to 21,593.12, 29,795.85 and 12,638.57 is: 17,439.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,593.12 : 29,795.85 = 12,638.57 : x
  2. Step 2: Convert to fraction form
    21,593.12/29,795.85 = 12,638.57/x
  3. Step 3: Cross multiply
    21,593.12x = 29,795.85 × 12,638.57
  4. Step 4: Simplify right side
    21,593.12x = 376,576,786.96
  5. Step 5: Solve for x
    x = 376,576,786.96/21,593.12
  6. Step 6: Final answer
    x = 17,439.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.