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Finding the Fourth Proportional to 13,371.60, 20,057.40 and 9,872.40

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Solution

The fourth proportional to 13,371.60, 20,057.40 and 9,872.40 is: 14,808.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,371.60 : 20,057.40 = 9,872.40 : x
  2. Step 2: Convert to fraction form
    13,371.60/20,057.40 = 9,872.40/x
  3. Step 3: Cross multiply
    13,371.60x = 20,057.40 × 9,872.40
  4. Step 4: Simplify right side
    13,371.60x = 198,014,675.76
  5. Step 5: Solve for x
    x = 198,014,675.76/13,371.60
  6. Step 6: Final answer
    x = 14,808.60

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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.