Home / 15,686.87-21,647.92-8,613.75

Finding the Fourth Proportional to 15,686.87, 21,647.92 and 8,613.75

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Solution

The fourth proportional to 15,686.87, 21,647.92 and 8,613.75 is: 11,886.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.87 : 21,647.92 = 8,613.75 : x
  2. Step 2: Convert to fraction form
    15,686.87/21,647.92 = 8,613.75/x
  3. Step 3: Cross multiply
    15,686.87x = 21,647.92 × 8,613.75
  4. Step 4: Simplify right side
    15,686.87x = 186,469,619.59
  5. Step 5: Solve for x
    x = 186,469,619.59/15,686.87
  6. Step 6: Final answer
    x = 11,886.99

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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.