Home / 13,615.20-18,782.82-8,575.92

Finding the Fourth Proportional to 13,615.20, 18,782.82 and 8,575.92

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Solution

The fourth proportional to 13,615.20, 18,782.82 and 8,575.92 is: 11,830.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.20 : 18,782.82 = 8,575.92 : x
  2. Step 2: Convert to fraction form
    13,615.20/18,782.82 = 8,575.92/x
  3. Step 3: Cross multiply
    13,615.20x = 18,782.82 × 8,575.92
  4. Step 4: Simplify right side
    13,615.20x = 161,079,961.69
  5. Step 5: Solve for x
    x = 161,079,961.69/13,615.20
  6. Step 6: Final answer
    x = 11,830.89

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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.