Home / 11,145.09-16,708.42-8,690.79

Finding the Fourth Proportional to 11,145.09, 16,708.42 and 8,690.79

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Solution

The fourth proportional to 11,145.09, 16,708.42 and 8,690.79 is: 13,029.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,145.09 : 16,708.42 = 8,690.79 : x
  2. Step 2: Convert to fraction form
    11,145.09/16,708.42 = 8,690.79/x
  3. Step 3: Cross multiply
    11,145.09x = 16,708.42 × 8,690.79
  4. Step 4: Simplify right side
    11,145.09x = 145,209,305.95
  5. Step 5: Solve for x
    x = 145,209,305.95/11,145.09
  6. Step 6: Final answer
    x = 13,029.00

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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.