Home / 15,489.92-21,376.15-8,416.37

Finding the Fourth Proportional to 15,489.92, 21,376.15 and 8,416.37

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Solution

The fourth proportional to 15,489.92, 21,376.15 and 8,416.37 is: 11,614.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.92 : 21,376.15 = 8,416.37 : x
  2. Step 2: Convert to fraction form
    15,489.92/21,376.15 = 8,416.37/x
  3. Step 3: Cross multiply
    15,489.92x = 21,376.15 × 8,416.37
  4. Step 4: Simplify right side
    15,489.92x = 179,909,619.97
  5. Step 5: Solve for x
    x = 179,909,619.97/15,489.92
  6. Step 6: Final answer
    x = 11,614.62

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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.