Home / 20,939.45-28,862.72-17,155.94

Finding the Fourth Proportional to 20,939.45, 28,862.72 and 17,155.94

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Solution

The fourth proportional to 20,939.45, 28,862.72 and 17,155.94 is: 23,647.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.45 : 28,862.72 = 17,155.94 : x
  2. Step 2: Convert to fraction form
    20,939.45/28,862.72 = 17,155.94/x
  3. Step 3: Cross multiply
    20,939.45x = 28,862.72 × 17,155.94
  4. Step 4: Simplify right side
    20,939.45x = 495,166,862.46
  5. Step 5: Solve for x
    x = 495,166,862.46/20,939.45
  6. Step 6: Final answer
    x = 23,647.56

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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.