Home / 20,574.55-28,392.78-11,143.09

Finding the Fourth Proportional to 20,574.55, 28,392.78 and 11,143.09

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Solution

The fourth proportional to 20,574.55, 28,392.78 and 11,143.09 is: 15,377.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.55 : 28,392.78 = 11,143.09 : x
  2. Step 2: Convert to fraction form
    20,574.55/28,392.78 = 11,143.09/x
  3. Step 3: Cross multiply
    20,574.55x = 28,392.78 × 11,143.09
  4. Step 4: Simplify right side
    20,574.55x = 316,383,302.89
  5. Step 5: Solve for x
    x = 316,383,302.89/20,574.55
  6. Step 6: Final answer
    x = 15,377.41

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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.