Home / 20,580.62-28,411.05-13,786.34

Finding the Fourth Proportional to 20,580.62, 28,411.05 and 13,786.34

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Solution

The fourth proportional to 20,580.62, 28,411.05 and 13,786.34 is: 19,031.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.62 : 28,411.05 = 13,786.34 : x
  2. Step 2: Convert to fraction form
    20,580.62/28,411.05 = 13,786.34/x
  3. Step 3: Cross multiply
    20,580.62x = 28,411.05 × 13,786.34
  4. Step 4: Simplify right side
    20,580.62x = 391,684,304.70
  5. Step 5: Solve for x
    x = 391,684,304.70/20,580.62
  6. Step 6: Final answer
    x = 19,031.71

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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.