Home / 13,928.10-20,908.35-8,387.70

Finding the Fourth Proportional to 13,928.10, 20,908.35 and 8,387.70

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Solution

The fourth proportional to 13,928.10, 20,908.35 and 8,387.70 is: 12,591.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.10 : 20,908.35 = 8,387.70 : x
  2. Step 2: Convert to fraction form
    13,928.10/20,908.35 = 8,387.70/x
  3. Step 3: Cross multiply
    13,928.10x = 20,908.35 × 8,387.70
  4. Step 4: Simplify right side
    13,928.10x = 175,372,967.30
  5. Step 5: Solve for x
    x = 175,372,967.30/13,928.10
  6. Step 6: Final answer
    x = 12,591.31

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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.