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Finding the Fourth Proportional to 13,427.80, 20,141.70 and 9,712.60

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Solution

The fourth proportional to 13,427.80, 20,141.70 and 9,712.60 is: 14,568.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,427.80 : 20,141.70 = 9,712.60 : x
  2. Step 2: Convert to fraction form
    13,427.80/20,141.70 = 9,712.60/x
  3. Step 3: Cross multiply
    13,427.80x = 20,141.70 × 9,712.60
  4. Step 4: Simplify right side
    13,427.80x = 195,628,275.42
  5. Step 5: Solve for x
    x = 195,628,275.42/13,427.80
  6. Step 6: Final answer
    x = 14,568.90

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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.