Home / 20,180.90-27,859.72-15,633.46

Finding the Fourth Proportional to 20,180.90, 27,859.72 and 15,633.46

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Solution

The fourth proportional to 20,180.90, 27,859.72 and 15,633.46 is: 21,581.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,180.90 : 27,859.72 = 15,633.46 : x
  2. Step 2: Convert to fraction form
    20,180.90/27,859.72 = 15,633.46/x
  3. Step 3: Cross multiply
    20,180.90x = 27,859.72 × 15,633.46
  4. Step 4: Simplify right side
    20,180.90x = 435,543,730.54
  5. Step 5: Solve for x
    x = 435,543,730.54/20,180.90
  6. Step 6: Final answer
    x = 21,581.98

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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.