Home / 18,728.28-28,133.33-13,829.40

Finding the Fourth Proportional to 18,728.28, 28,133.33 and 13,829.40

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Solution

The fourth proportional to 18,728.28, 28,133.33 and 13,829.40 is: 20,774.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.28 : 28,133.33 = 13,829.40 : x
  2. Step 2: Convert to fraction form
    18,728.28/28,133.33 = 13,829.40/x
  3. Step 3: Cross multiply
    18,728.28x = 28,133.33 × 13,829.40
  4. Step 4: Simplify right side
    18,728.28x = 389,067,004.76
  5. Step 5: Solve for x
    x = 389,067,004.76/18,728.28
  6. Step 6: Final answer
    x = 20,774.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.