Home / 28,067.20-38,735.46-20,981.32

Finding the Fourth Proportional to 28,067.20, 38,735.46 and 20,981.32

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Solution

The fourth proportional to 28,067.20, 38,735.46 and 20,981.32 is: 28,956.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,067.20 : 38,735.46 = 20,981.32 : x
  2. Step 2: Convert to fraction form
    28,067.20/38,735.46 = 20,981.32/x
  3. Step 3: Cross multiply
    28,067.20x = 38,735.46 × 20,981.32
  4. Step 4: Simplify right side
    28,067.20x = 812,721,081.61
  5. Step 5: Solve for x
    x = 812,721,081.61/28,067.20
  6. Step 6: Final answer
    x = 28,956.26

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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.