Home / 15,131.44-20,880.84-8,416.92

Finding the Fourth Proportional to 15,131.44, 20,880.84 and 8,416.92

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Solution

The fourth proportional to 15,131.44, 20,880.84 and 8,416.92 is: 11,615.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.44 : 20,880.84 = 8,416.92 : x
  2. Step 2: Convert to fraction form
    15,131.44/20,880.84 = 8,416.92/x
  3. Step 3: Cross multiply
    15,131.44x = 20,880.84 × 8,416.92
  4. Step 4: Simplify right side
    15,131.44x = 175,752,359.81
  5. Step 5: Solve for x
    x = 175,752,359.81/15,131.44
  6. Step 6: Final answer
    x = 11,615.05

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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.