Home / 21,003.75-28,984.35-11,443.72

Finding the Fourth Proportional to 21,003.75, 28,984.35 and 11,443.72

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Solution

The fourth proportional to 21,003.75, 28,984.35 and 11,443.72 is: 15,791.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.75 : 28,984.35 = 11,443.72 : x
  2. Step 2: Convert to fraction form
    21,003.75/28,984.35 = 11,443.72/x
  3. Step 3: Cross multiply
    21,003.75x = 28,984.35 × 11,443.72
  4. Step 4: Simplify right side
    21,003.75x = 331,688,670.41
  5. Step 5: Solve for x
    x = 331,688,670.41/21,003.75
  6. Step 6: Final answer
    x = 15,791.88

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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.