Home / 28,809.38-39,756.96-15,561.38

Finding the Fourth Proportional to 28,809.38, 39,756.96 and 15,561.38

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Solution

The fourth proportional to 28,809.38, 39,756.96 and 15,561.38 is: 21,474.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,809.38 : 39,756.96 = 15,561.38 : x
  2. Step 2: Convert to fraction form
    28,809.38/39,756.96 = 15,561.38/x
  3. Step 3: Cross multiply
    28,809.38x = 39,756.96 × 15,561.38
  4. Step 4: Simplify right side
    28,809.38x = 618,672,963.42
  5. Step 5: Solve for x
    x = 618,672,963.42/28,809.38
  6. Step 6: Final answer
    x = 21,474.71

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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.