Home / 15,490.43-21,376.92-8,416.85

Finding the Fourth Proportional to 15,490.43, 21,376.92 and 8,416.85

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Solution

The fourth proportional to 15,490.43, 21,376.92 and 8,416.85 is: 11,615.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.43 : 21,376.92 = 8,416.85 : x
  2. Step 2: Convert to fraction form
    15,490.43/21,376.92 = 8,416.85/x
  3. Step 3: Cross multiply
    15,490.43x = 21,376.92 × 8,416.85
  4. Step 4: Simplify right side
    15,490.43x = 179,926,403.59
  5. Step 5: Solve for x
    x = 179,926,403.59/15,490.43
  6. Step 6: Final answer
    x = 11,615.33

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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.