Home / 28,521.27-39,358.80-15,775.56

Finding the Fourth Proportional to 28,521.27, 39,358.80 and 15,775.56

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Solution

The fourth proportional to 28,521.27, 39,358.80 and 15,775.56 is: 21,769.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,521.27 : 39,358.80 = 15,775.56 : x
  2. Step 2: Convert to fraction form
    28,521.27/39,358.80 = 15,775.56/x
  3. Step 3: Cross multiply
    28,521.27x = 39,358.80 × 15,775.56
  4. Step 4: Simplify right side
    28,521.27x = 620,907,110.93
  5. Step 5: Solve for x
    x = 620,907,110.93/28,521.27
  6. Step 6: Final answer
    x = 21,769.97

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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.