Home / 10,785.80-16,178.70-3,390.76

Finding the Fourth Proportional to 10,785.80, 16,178.70 and 3,390.76

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Solution

The fourth proportional to 10,785.80, 16,178.70 and 3,390.76 is: 5,086.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,785.80 : 16,178.70 = 3,390.76 : x
  2. Step 2: Convert to fraction form
    10,785.80/16,178.70 = 3,390.76/x
  3. Step 3: Cross multiply
    10,785.80x = 16,178.70 × 3,390.76
  4. Step 4: Simplify right side
    10,785.80x = 54,858,088.81
  5. Step 5: Solve for x
    x = 54,858,088.81/10,785.80
  6. Step 6: Final answer
    x = 5,086.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.