Home / 28,660.31-39,570.50-21,933.92

Finding the Fourth Proportional to 28,660.31, 39,570.50 and 21,933.92

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Solution

The fourth proportional to 28,660.31, 39,570.50 and 21,933.92 is: 30,283.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,660.31 : 39,570.50 = 21,933.92 : x
  2. Step 2: Convert to fraction form
    28,660.31/39,570.50 = 21,933.92/x
  3. Step 3: Cross multiply
    28,660.31x = 39,570.50 × 21,933.92
  4. Step 4: Simplify right side
    28,660.31x = 867,935,873.84
  5. Step 5: Solve for x
    x = 867,935,873.84/28,660.31
  6. Step 6: Final answer
    x = 30,283.55

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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.