Home / 12,785.57-19,179.71-3,900.87

Finding the Fourth Proportional to 12,785.57, 19,179.71 and 3,900.87

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Solution

The fourth proportional to 12,785.57, 19,179.71 and 3,900.87 is: 5,851.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,785.57 : 19,179.71 = 3,900.87 : x
  2. Step 2: Convert to fraction form
    12,785.57/19,179.71 = 3,900.87/x
  3. Step 3: Cross multiply
    12,785.57x = 19,179.71 × 3,900.87
  4. Step 4: Simplify right side
    12,785.57x = 74,817,535.84
  5. Step 5: Solve for x
    x = 74,817,535.84/12,785.57
  6. Step 6: Final answer
    x = 5,851.72

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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.