Home / 21,147.75-29,187.27-12,769.11

Finding the Fourth Proportional to 21,147.75, 29,187.27 and 12,769.11

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Solution

The fourth proportional to 21,147.75, 29,187.27 and 12,769.11 is: 17,623.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.75 : 29,187.27 = 12,769.11 : x
  2. Step 2: Convert to fraction form
    21,147.75/29,187.27 = 12,769.11/x
  3. Step 3: Cross multiply
    21,147.75x = 29,187.27 × 12,769.11
  4. Step 4: Simplify right side
    21,147.75x = 372,695,461.23
  5. Step 5: Solve for x
    x = 372,695,461.23/21,147.75
  6. Step 6: Final answer
    x = 17,623.41

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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.