Home / 15,687.91-21,649.31-8,614.79

Finding the Fourth Proportional to 15,687.91, 21,649.31 and 8,614.79

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Solution

The fourth proportional to 15,687.91, 21,649.31 and 8,614.79 is: 11,888.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.91 : 21,649.31 = 8,614.79 : x
  2. Step 2: Convert to fraction form
    15,687.91/21,649.31 = 8,614.79/x
  3. Step 3: Cross multiply
    15,687.91x = 21,649.31 × 8,614.79
  4. Step 4: Simplify right side
    15,687.91x = 186,504,259.29
  5. Step 5: Solve for x
    x = 186,504,259.29/15,687.91
  6. Step 6: Final answer
    x = 11,888.41

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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.