Home / 8,839.05-12,186.55-7,239.80

Finding the Fourth Proportional to 8,839.05, 12,186.55 and 7,239.80

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Solution

The fourth proportional to 8,839.05, 12,186.55 and 7,239.80 is: 9,981.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,839.05 : 12,186.55 = 7,239.80 : x
  2. Step 2: Convert to fraction form
    8,839.05/12,186.55 = 7,239.80/x
  3. Step 3: Cross multiply
    8,839.05x = 12,186.55 × 7,239.80
  4. Step 4: Simplify right side
    8,839.05x = 88,228,184.69
  5. Step 5: Solve for x
    x = 88,228,184.69/8,839.05
  6. Step 6: Final answer
    x = 9,981.64

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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.