Home / 20,691.64-28,587.92-14,431.96

Finding the Fourth Proportional to 20,691.64, 28,587.92 and 14,431.96

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Solution

The fourth proportional to 20,691.64, 28,587.92 and 14,431.96 is: 19,939.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.64 : 28,587.92 = 14,431.96 : x
  2. Step 2: Convert to fraction form
    20,691.64/28,587.92 = 14,431.96/x
  3. Step 3: Cross multiply
    20,691.64x = 28,587.92 × 14,431.96
  4. Step 4: Simplify right side
    20,691.64x = 412,579,717.92
  5. Step 5: Solve for x
    x = 412,579,717.92/20,691.64
  6. Step 6: Final answer
    x = 19,939.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.