Home / 15,687.41-21,648.65-8,614.28

Finding the Fourth Proportional to 15,687.41, 21,648.65 and 8,614.28

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Solution

The fourth proportional to 15,687.41, 21,648.65 and 8,614.28 is: 11,887.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.41 : 21,648.65 = 8,614.28 : x
  2. Step 2: Convert to fraction form
    15,687.41/21,648.65 = 8,614.28/x
  3. Step 3: Cross multiply
    15,687.41x = 21,648.65 × 8,614.28
  4. Step 4: Simplify right side
    15,687.41x = 186,487,381.41
  5. Step 5: Solve for x
    x = 186,487,381.41/15,687.41
  6. Step 6: Final answer
    x = 11,887.71

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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.