Home / 12,786.80-19,088.90-10,817.96

Finding the Fourth Proportional to 12,786.80, 19,088.90 and 10,817.96

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Solution

The fourth proportional to 12,786.80, 19,088.90 and 10,817.96 is: 16,149.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.80 : 19,088.90 = 10,817.96 : x
  2. Step 2: Convert to fraction form
    12,786.80/19,088.90 = 10,817.96/x
  3. Step 3: Cross multiply
    12,786.80x = 19,088.90 × 10,817.96
  4. Step 4: Simplify right side
    12,786.80x = 206,502,956.64
  5. Step 5: Solve for x
    x = 206,502,956.64/12,786.80
  6. Step 6: Final answer
    x = 16,149.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.