Home / 10,785.92-16,178.51-3,390.21

Finding the Fourth Proportional to 10,785.92, 16,178.51 and 3,390.21

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Solution

The fourth proportional to 10,785.92, 16,178.51 and 3,390.21 is: 5,085.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,785.92 : 16,178.51 = 3,390.21 : x
  2. Step 2: Convert to fraction form
    10,785.92/16,178.51 = 3,390.21/x
  3. Step 3: Cross multiply
    10,785.92x = 16,178.51 × 3,390.21
  4. Step 4: Simplify right side
    10,785.92x = 54,848,554.86
  5. Step 5: Solve for x
    x = 54,848,554.86/10,785.92
  6. Step 6: Final answer
    x = 5,085.20

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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.