Home / 8,786.40-12,117.96-6,396.36

Finding the Fourth Proportional to 8,786.40, 12,117.96 and 6,396.36

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Solution

The fourth proportional to 8,786.40, 12,117.96 and 6,396.36 is: 8,821.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,786.40 : 12,117.96 = 6,396.36 : x
  2. Step 2: Convert to fraction form
    8,786.40/12,117.96 = 6,396.36/x
  3. Step 3: Cross multiply
    8,786.40x = 12,117.96 × 6,396.36
  4. Step 4: Simplify right side
    8,786.40x = 77,510,834.63
  5. Step 5: Solve for x
    x = 77,510,834.63/8,786.40
  6. Step 6: Final answer
    x = 8,821.68

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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.