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Finding the Fourth Proportional to 13,410.90, 20,121.82 and 10,802.90

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Solution

The fourth proportional to 13,410.90, 20,121.82 and 10,802.90 is: 16,208.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,410.90 : 20,121.82 = 10,802.90 : x
  2. Step 2: Convert to fraction form
    13,410.90/20,121.82 = 10,802.90/x
  3. Step 3: Cross multiply
    13,410.90x = 20,121.82 × 10,802.90
  4. Step 4: Simplify right side
    13,410.90x = 217,374,009.28
  5. Step 5: Solve for x
    x = 217,374,009.28/13,410.90
  6. Step 6: Final answer
    x = 16,208.76

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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.