Home / 13,579.76-18,734.28-9,380.72

Finding the Fourth Proportional to 13,579.76, 18,734.28 and 9,380.72

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Solution

The fourth proportional to 13,579.76, 18,734.28 and 9,380.72 is: 12,941.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.76 : 18,734.28 = 9,380.72 : x
  2. Step 2: Convert to fraction form
    13,579.76/18,734.28 = 9,380.72/x
  3. Step 3: Cross multiply
    13,579.76x = 18,734.28 × 9,380.72
  4. Step 4: Simplify right side
    13,579.76x = 175,741,035.08
  5. Step 5: Solve for x
    x = 175,741,035.08/13,579.76
  6. Step 6: Final answer
    x = 12,941.39

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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.