Home / 11,113.80-16,686.90-8,651.40

Finding the Fourth Proportional to 11,113.80, 16,686.90 and 8,651.40

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Solution

The fourth proportional to 11,113.80, 16,686.90 and 8,651.40 is: 12,989.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,113.80 : 16,686.90 = 8,651.40 : x
  2. Step 2: Convert to fraction form
    11,113.80/16,686.90 = 8,651.40/x
  3. Step 3: Cross multiply
    11,113.80x = 16,686.90 × 8,651.40
  4. Step 4: Simplify right side
    11,113.80x = 144,365,046.66
  5. Step 5: Solve for x
    x = 144,365,046.66/11,113.80
  6. Step 6: Final answer
    x = 12,989.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.