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Finding the Fourth Proportional to 13,449.70, 20,152.95 and 12,672.10

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Solution

The fourth proportional to 13,449.70, 20,152.95 and 12,672.10 is: 18,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,449.70 : 20,152.95 = 12,672.10 : x
  2. Step 2: Convert to fraction form
    13,449.70/20,152.95 = 12,672.10/x
  3. Step 3: Cross multiply
    13,449.70x = 20,152.95 × 12,672.10
  4. Step 4: Simplify right side
    13,449.70x = 255,380,197.70
  5. Step 5: Solve for x
    x = 255,380,197.70/13,449.70
  6. Step 6: Final answer
    x = 18,987.80

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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.