Home / 15,490.28-21,376.62-8,416.80

Finding the Fourth Proportional to 15,490.28, 21,376.62 and 8,416.80

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Solution

The fourth proportional to 15,490.28, 21,376.62 and 8,416.80 is: 11,615.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.28 : 21,376.62 = 8,416.80 : x
  2. Step 2: Convert to fraction form
    15,490.28/21,376.62 = 8,416.80/x
  3. Step 3: Cross multiply
    15,490.28x = 21,376.62 × 8,416.80
  4. Step 4: Simplify right side
    15,490.28x = 179,922,735.22
  5. Step 5: Solve for x
    x = 179,922,735.22/15,490.28
  6. Step 6: Final answer
    x = 11,615.20

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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.