Home / 28,086.64-38,759.54-15,511.38

Finding the Fourth Proportional to 28,086.64, 38,759.54 and 15,511.38

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Solution

The fourth proportional to 28,086.64, 38,759.54 and 15,511.38 is: 21,405.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,086.64 : 38,759.54 = 15,511.38 : x
  2. Step 2: Convert to fraction form
    28,086.64/38,759.54 = 15,511.38/x
  3. Step 3: Cross multiply
    28,086.64x = 38,759.54 × 15,511.38
  4. Step 4: Simplify right side
    28,086.64x = 601,213,953.57
  5. Step 5: Solve for x
    x = 601,213,953.57/28,086.64
  6. Step 6: Final answer
    x = 21,405.69

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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.