Home / 20,939.84-28,866.35-17,157.02

Finding the Fourth Proportional to 20,939.84, 28,866.35 and 17,157.02

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Solution

The fourth proportional to 20,939.84, 28,866.35 and 17,157.02 is: 23,651.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.84 : 28,866.35 = 17,157.02 : x
  2. Step 2: Convert to fraction form
    20,939.84/28,866.35 = 17,157.02/x
  3. Step 3: Cross multiply
    20,939.84x = 28,866.35 × 17,157.02
  4. Step 4: Simplify right side
    20,939.84x = 495,260,394.58
  5. Step 5: Solve for x
    x = 495,260,394.58/20,939.84
  6. Step 6: Final answer
    x = 23,651.58

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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.