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Finding the Fourth Proportional to 36,009.90, 53,998.65 and 13,815.90

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Solution

The fourth proportional to 36,009.90, 53,998.65 and 13,815.90 is: 20,717.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,009.90 : 53,998.65 = 13,815.90 : x
  2. Step 2: Convert to fraction form
    36,009.90/53,998.65 = 13,815.90/x
  3. Step 3: Cross multiply
    36,009.90x = 53,998.65 × 13,815.90
  4. Step 4: Simplify right side
    36,009.90x = 746,039,948.54
  5. Step 5: Solve for x
    x = 746,039,948.54/36,009.90
  6. Step 6: Final answer
    x = 20,717.63

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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.