Home / 13,785.72-20,675.48-3,924.78

Finding the Fourth Proportional to 13,785.72, 20,675.48 and 3,924.78

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Solution

The fourth proportional to 13,785.72, 20,675.48 and 3,924.78 is: 5,886.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,785.72 : 20,675.48 = 3,924.78 : x
  2. Step 2: Convert to fraction form
    13,785.72/20,675.48 = 3,924.78/x
  3. Step 3: Cross multiply
    13,785.72x = 20,675.48 × 3,924.78
  4. Step 4: Simplify right side
    13,785.72x = 81,146,690.77
  5. Step 5: Solve for x
    x = 81,146,690.77/13,785.72
  6. Step 6: Final answer
    x = 5,886.29

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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.