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Finding the Fourth Proportional to 13,935.60, 20,903.40 and 12,404.70

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Solution

The fourth proportional to 13,935.60, 20,903.40 and 12,404.70 is: 18,607.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,935.60 : 20,903.40 = 12,404.70 : x
  2. Step 2: Convert to fraction form
    13,935.60/20,903.40 = 12,404.70/x
  3. Step 3: Cross multiply
    13,935.60x = 20,903.40 × 12,404.70
  4. Step 4: Simplify right side
    13,935.60x = 259,300,405.98
  5. Step 5: Solve for x
    x = 259,300,405.98/13,935.60
  6. Step 6: Final answer
    x = 18,607.05

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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.