Home / 20,928.42-28,886.22-11,981.10

Finding the Fourth Proportional to 20,928.42, 28,886.22 and 11,981.10

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Solution

The fourth proportional to 20,928.42, 28,886.22 and 11,981.10 is: 16,536.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.42 : 28,886.22 = 11,981.10 : x
  2. Step 2: Convert to fraction form
    20,928.42/28,886.22 = 11,981.10/x
  3. Step 3: Cross multiply
    20,928.42x = 28,886.22 × 11,981.10
  4. Step 4: Simplify right side
    20,928.42x = 346,088,690.44
  5. Step 5: Solve for x
    x = 346,088,690.44/20,928.42
  6. Step 6: Final answer
    x = 16,536.78

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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.