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Finding the Fourth Proportional to 13,471.80, 20,207.70 and 9,756.60

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Solution

The fourth proportional to 13,471.80, 20,207.70 and 9,756.60 is: 14,634.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,471.80 : 20,207.70 = 9,756.60 : x
  2. Step 2: Convert to fraction form
    13,471.80/20,207.70 = 9,756.60/x
  3. Step 3: Cross multiply
    13,471.80x = 20,207.70 × 9,756.60
  4. Step 4: Simplify right side
    13,471.80x = 197,158,445.82
  5. Step 5: Solve for x
    x = 197,158,445.82/13,471.80
  6. Step 6: Final answer
    x = 14,634.90

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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.