Home / 20,928.40-28,881.04-12,544.88

Finding the Fourth Proportional to 20,928.40, 28,881.04 and 12,544.88

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Solution

The fourth proportional to 20,928.40, 28,881.04 and 12,544.88 is: 17,311.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.40 : 28,881.04 = 12,544.88 : x
  2. Step 2: Convert to fraction form
    20,928.40/28,881.04 = 12,544.88/x
  3. Step 3: Cross multiply
    20,928.40x = 28,881.04 × 12,544.88
  4. Step 4: Simplify right side
    20,928.40x = 362,309,181.08
  5. Step 5: Solve for x
    x = 362,309,181.08/20,928.40
  6. Step 6: Final answer
    x = 17,311.84

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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.