Home / 15,131.31-20,882.21-8,416.91

Finding the Fourth Proportional to 15,131.31, 20,882.21 and 8,416.91

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Solution

The fourth proportional to 15,131.31, 20,882.21 and 8,416.91 is: 11,615.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.31 : 20,882.21 = 8,416.91 : x
  2. Step 2: Convert to fraction form
    15,131.31/20,882.21 = 8,416.91/x
  3. Step 3: Cross multiply
    15,131.31x = 20,882.21 × 8,416.91
  4. Step 4: Simplify right side
    15,131.31x = 175,763,692.29
  5. Step 5: Solve for x
    x = 175,763,692.29/15,131.31
  6. Step 6: Final answer
    x = 11,615.90

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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.