Home / 12,913.39-17,820.68-7,170.69

Finding the Fourth Proportional to 12,913.39, 17,820.68 and 7,170.69

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Solution

The fourth proportional to 12,913.39, 17,820.68 and 7,170.69 is: 9,895.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,913.39 : 17,820.68 = 7,170.69 : x
  2. Step 2: Convert to fraction form
    12,913.39/17,820.68 = 7,170.69/x
  3. Step 3: Cross multiply
    12,913.39x = 17,820.68 × 7,170.69
  4. Step 4: Simplify right side
    12,913.39x = 127,786,571.87
  5. Step 5: Solve for x
    x = 127,786,571.87/12,913.39
  6. Step 6: Final answer
    x = 9,895.66

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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.