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Finding the Fourth Proportional to 13,473.21, 20,160.60 and 7,929.18

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Solution

The fourth proportional to 13,473.21, 20,160.60 and 7,929.18 is: 11,864.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,473.21 : 20,160.60 = 7,929.18 : x
  2. Step 2: Convert to fraction form
    13,473.21/20,160.60 = 7,929.18/x
  3. Step 3: Cross multiply
    13,473.21x = 20,160.60 × 7,929.18
  4. Step 4: Simplify right side
    13,473.21x = 159,857,026.31
  5. Step 5: Solve for x
    x = 159,857,026.31/13,473.21
  6. Step 6: Final answer
    x = 11,864.81

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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.