Home / 27,780.84-38,338.65-15,205.59

Finding the Fourth Proportional to 27,780.84, 38,338.65 and 15,205.59

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Solution

The fourth proportional to 27,780.84, 38,338.65 and 15,205.59 is: 20,984.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,780.84 : 38,338.65 = 15,205.59 : x
  2. Step 2: Convert to fraction form
    27,780.84/38,338.65 = 15,205.59/x
  3. Step 3: Cross multiply
    27,780.84x = 38,338.65 × 15,205.59
  4. Step 4: Simplify right side
    27,780.84x = 582,961,793.05
  5. Step 5: Solve for x
    x = 582,961,793.05/27,780.84
  6. Step 6: Final answer
    x = 20,984.31

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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.