Home / 28,811.31-39,775.31-19,906.76

Finding the Fourth Proportional to 28,811.31, 39,775.31 and 19,906.76

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Solution

The fourth proportional to 28,811.31, 39,775.31 and 19,906.76 is: 27,482.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,811.31 : 39,775.31 = 19,906.76 : x
  2. Step 2: Convert to fraction form
    28,811.31/39,775.31 = 19,906.76/x
  3. Step 3: Cross multiply
    28,811.31x = 39,775.31 × 19,906.76
  4. Step 4: Simplify right side
    28,811.31x = 791,797,251.69
  5. Step 5: Solve for x
    x = 791,797,251.69/28,811.31
  6. Step 6: Final answer
    x = 27,482.17

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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.