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Finding the Fourth Proportional to 13,881.60, 20,822.40 and 12,350.70

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Solution

The fourth proportional to 13,881.60, 20,822.40 and 12,350.70 is: 18,526.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.60 : 20,822.40 = 12,350.70 : x
  2. Step 2: Convert to fraction form
    13,881.60/20,822.40 = 12,350.70/x
  3. Step 3: Cross multiply
    13,881.60x = 20,822.40 × 12,350.70
  4. Step 4: Simplify right side
    13,881.60x = 257,171,215.68
  5. Step 5: Solve for x
    x = 257,171,215.68/13,881.60
  6. Step 6: Final answer
    x = 18,526.05

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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.