Home / 21,147.91-31,767.64-13,748.56

Finding the Fourth Proportional to 21,147.91, 31,767.64 and 13,748.56

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Solution

The fourth proportional to 21,147.91, 31,767.64 and 13,748.56 is: 20,652.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.91 : 31,767.64 = 13,748.56 : x
  2. Step 2: Convert to fraction form
    21,147.91/31,767.64 = 13,748.56/x
  3. Step 3: Cross multiply
    21,147.91x = 31,767.64 × 13,748.56
  4. Step 4: Simplify right side
    21,147.91x = 436,759,190.81
  5. Step 5: Solve for x
    x = 436,759,190.81/21,147.91
  6. Step 6: Final answer
    x = 20,652.60

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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.