Home / 20,128.91-27,772.24-12,582.91

Finding the Fourth Proportional to 20,128.91, 27,772.24 and 12,582.91

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Solution

The fourth proportional to 20,128.91, 27,772.24 and 12,582.91 is: 17,360.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.91 : 27,772.24 = 12,582.91 : x
  2. Step 2: Convert to fraction form
    20,128.91/27,772.24 = 12,582.91/x
  3. Step 3: Cross multiply
    20,128.91x = 27,772.24 × 12,582.91
  4. Step 4: Simplify right side
    20,128.91x = 349,455,596.42
  5. Step 5: Solve for x
    x = 349,455,596.42/20,128.91
  6. Step 6: Final answer
    x = 17,360.88

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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.