Home / 28,180.88-38,890.44-15,605.84

Finding the Fourth Proportional to 28,180.88, 38,890.44 and 15,605.84

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Solution

The fourth proportional to 28,180.88, 38,890.44 and 15,605.84 is: 21,536.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.88 : 38,890.44 = 15,605.84 : x
  2. Step 2: Convert to fraction form
    28,180.88/38,890.44 = 15,605.84/x
  3. Step 3: Cross multiply
    28,180.88x = 38,890.44 × 15,605.84
  4. Step 4: Simplify right side
    28,180.88x = 606,917,984.17
  5. Step 5: Solve for x
    x = 606,917,984.17/28,180.88
  6. Step 6: Final answer
    x = 21,536.52

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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.