Home / 12,190.35-16,821.81-7,154.78

Finding the Fourth Proportional to 12,190.35, 16,821.81 and 7,154.78

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Solution

The fourth proportional to 12,190.35, 16,821.81 and 7,154.78 is: 9,873.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.35 : 16,821.81 = 7,154.78 : x
  2. Step 2: Convert to fraction form
    12,190.35/16,821.81 = 7,154.78/x
  3. Step 3: Cross multiply
    12,190.35x = 16,821.81 × 7,154.78
  4. Step 4: Simplify right side
    12,190.35x = 120,356,349.75
  5. Step 5: Solve for x
    x = 120,356,349.75/12,190.35
  6. Step 6: Final answer
    x = 9,873.08

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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.