Home / 12,190.58-16,821.29-6,812.78

Finding the Fourth Proportional to 12,190.58, 16,821.29 and 6,812.78

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Solution

The fourth proportional to 12,190.58, 16,821.29 and 6,812.78 is: 9,400.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.58 : 16,821.29 = 6,812.78 : x
  2. Step 2: Convert to fraction form
    12,190.58/16,821.29 = 6,812.78/x
  3. Step 3: Cross multiply
    12,190.58x = 16,821.29 × 6,812.78
  4. Step 4: Simplify right side
    12,190.58x = 114,599,807.17
  5. Step 5: Solve for x
    x = 114,599,807.17/12,190.58
  6. Step 6: Final answer
    x = 9,400.69

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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.