Home / 28,087.74-38,759.13-15,511.50

Finding the Fourth Proportional to 28,087.74, 38,759.13 and 15,511.50

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Solution

The fourth proportional to 28,087.74, 38,759.13 and 15,511.50 is: 21,404.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,087.74 : 38,759.13 = 15,511.50 : x
  2. Step 2: Convert to fraction form
    28,087.74/38,759.13 = 15,511.50/x
  3. Step 3: Cross multiply
    28,087.74x = 38,759.13 × 15,511.50
  4. Step 4: Simplify right side
    28,087.74x = 601,212,245.00
  5. Step 5: Solve for x
    x = 601,212,245.00/28,087.74
  6. Step 6: Final answer
    x = 21,404.79

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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.