Home / 15,716.70-21,688.56-8,642.43

Finding the Fourth Proportional to 15,716.70, 21,688.56 and 8,642.43

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Solution

The fourth proportional to 15,716.70, 21,688.56 and 8,642.43 is: 11,926.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,716.70 : 21,688.56 = 8,642.43 : x
  2. Step 2: Convert to fraction form
    15,716.70/21,688.56 = 8,642.43/x
  3. Step 3: Cross multiply
    15,716.70x = 21,688.56 × 8,642.43
  4. Step 4: Simplify right side
    15,716.70x = 187,441,861.60
  5. Step 5: Solve for x
    x = 187,441,861.60/15,716.70
  6. Step 6: Final answer
    x = 11,926.29

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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.