Home / 12,762.20-17,618.04-8,515.78

Finding the Fourth Proportional to 12,762.20, 17,618.04 and 8,515.78

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Solution

The fourth proportional to 12,762.20, 17,618.04 and 8,515.78 is: 11,755.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,762.20 : 17,618.04 = 8,515.78 : x
  2. Step 2: Convert to fraction form
    12,762.20/17,618.04 = 8,515.78/x
  3. Step 3: Cross multiply
    12,762.20x = 17,618.04 × 8,515.78
  4. Step 4: Simplify right side
    12,762.20x = 150,031,352.67
  5. Step 5: Solve for x
    x = 150,031,352.67/12,762.20
  6. Step 6: Final answer
    x = 11,755.92

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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.