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Finding the Fourth Proportional to 15,105.96, 20,808.36 and 14,435.28

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Solution

The fourth proportional to 15,105.96, 20,808.36 and 14,435.28 is: 19,884.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,105.96 : 20,808.36 = 14,435.28 : x
  2. Step 2: Convert to fraction form
    15,105.96/20,808.36 = 14,435.28/x
  3. Step 3: Cross multiply
    15,105.96x = 20,808.36 × 14,435.28
  4. Step 4: Simplify right side
    15,105.96x = 300,374,502.94
  5. Step 5: Solve for x
    x = 300,374,502.94/15,105.96
  6. Step 6: Final answer
    x = 19,884.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.