Home / 15,486.29-21,371.31-8,771.75

Finding the Fourth Proportional to 15,486.29, 21,371.31 and 8,771.75

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Solution

The fourth proportional to 15,486.29, 21,371.31 and 8,771.75 is: 12,105.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.29 : 21,371.31 = 8,771.75 : x
  2. Step 2: Convert to fraction form
    15,486.29/21,371.31 = 8,771.75/x
  3. Step 3: Cross multiply
    15,486.29x = 21,371.31 × 8,771.75
  4. Step 4: Simplify right side
    15,486.29x = 187,463,788.49
  5. Step 5: Solve for x
    x = 187,463,788.49/15,486.29
  6. Step 6: Final answer
    x = 12,105.15

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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.