Home / 12,190.40-16,821.84-6,885.20

Finding the Fourth Proportional to 12,190.40, 16,821.84 and 6,885.20

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Solution

The fourth proportional to 12,190.40, 16,821.84 and 6,885.20 is: 9,501.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.40 : 16,821.84 = 6,885.20 : x
  2. Step 2: Convert to fraction form
    12,190.40/16,821.84 = 6,885.20/x
  3. Step 3: Cross multiply
    12,190.40x = 16,821.84 × 6,885.20
  4. Step 4: Simplify right side
    12,190.40x = 115,821,732.77
  5. Step 5: Solve for x
    x = 115,821,732.77/12,190.40
  6. Step 6: Final answer
    x = 9,501.06

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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.