Home / 27,986.89-38,581.11-21,260.84

Finding the Fourth Proportional to 27,986.89, 38,581.11 and 21,260.84

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Solution

The fourth proportional to 27,986.89, 38,581.11 and 21,260.84 is: 29,308.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,986.89 : 38,581.11 = 21,260.84 : x
  2. Step 2: Convert to fraction form
    27,986.89/38,581.11 = 21,260.84/x
  3. Step 3: Cross multiply
    27,986.89x = 38,581.11 × 21,260.84
  4. Step 4: Simplify right side
    27,986.89x = 820,266,885.10
  5. Step 5: Solve for x
    x = 820,266,885.10/27,986.89
  6. Step 6: Final answer
    x = 29,308.97

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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.