Home / 21,151.72-31,704.64-13,761.44

Finding the Fourth Proportional to 21,151.72, 31,704.64 and 13,761.44

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Solution

The fourth proportional to 21,151.72, 31,704.64 and 13,761.44 is: 20,627.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.72 : 31,704.64 = 13,761.44 : x
  2. Step 2: Convert to fraction form
    21,151.72/31,704.64 = 13,761.44/x
  3. Step 3: Cross multiply
    21,151.72x = 31,704.64 × 13,761.44
  4. Step 4: Simplify right side
    21,151.72x = 436,301,501.08
  5. Step 5: Solve for x
    x = 436,301,501.08/21,151.72
  6. Step 6: Final answer
    x = 20,627.24

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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.