Home / 13,936.08-20,885.13-7,686.71

Finding the Fourth Proportional to 13,936.08, 20,885.13 and 7,686.71

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Solution

The fourth proportional to 13,936.08, 20,885.13 and 7,686.71 is: 11,519.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,936.08 : 20,885.13 = 7,686.71 : x
  2. Step 2: Convert to fraction form
    13,936.08/20,885.13 = 7,686.71/x
  3. Step 3: Cross multiply
    13,936.08x = 20,885.13 × 7,686.71
  4. Step 4: Simplify right side
    13,936.08x = 160,537,833.20
  5. Step 5: Solve for x
    x = 160,537,833.20/13,936.08
  6. Step 6: Final answer
    x = 11,519.58

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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.