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Finding the Fourth Proportional to 13,410.99, 20,043.70 and 12,360.51

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Solution

The fourth proportional to 13,410.99, 20,043.70 and 12,360.51 is: 18,473.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,410.99 : 20,043.70 = 12,360.51 : x
  2. Step 2: Convert to fraction form
    13,410.99/20,043.70 = 12,360.51/x
  3. Step 3: Cross multiply
    13,410.99x = 20,043.70 × 12,360.51
  4. Step 4: Simplify right side
    13,410.99x = 247,750,323.39
  5. Step 5: Solve for x
    x = 247,750,323.39/13,410.99
  6. Step 6: Final answer
    x = 18,473.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.