Home / 21,266.28-29,347.11-12,769.38

Finding the Fourth Proportional to 21,266.28, 29,347.11 and 12,769.38

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Solution

The fourth proportional to 21,266.28, 29,347.11 and 12,769.38 is: 17,621.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,266.28 : 29,347.11 = 12,769.38 : x
  2. Step 2: Convert to fraction form
    21,266.28/29,347.11 = 12,769.38/x
  3. Step 3: Cross multiply
    21,266.28x = 29,347.11 × 12,769.38
  4. Step 4: Simplify right side
    21,266.28x = 374,744,399.49
  5. Step 5: Solve for x
    x = 374,744,399.49/21,266.28
  6. Step 6: Final answer
    x = 17,621.53

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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.