Home / 15,131.03-20,880.45-8,416.40

Finding the Fourth Proportional to 15,131.03, 20,880.45 and 8,416.40

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Solution

The fourth proportional to 15,131.03, 20,880.45 and 8,416.40 is: 11,614.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.03 : 20,880.45 = 8,416.40 : x
  2. Step 2: Convert to fraction form
    15,131.03/20,880.45 = 8,416.40/x
  3. Step 3: Cross multiply
    15,131.03x = 20,880.45 × 8,416.40
  4. Step 4: Simplify right side
    15,131.03x = 175,738,114.98
  5. Step 5: Solve for x
    x = 175,738,114.98/15,131.03
  6. Step 6: Final answer
    x = 11,614.42

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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.