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Finding the Fourth Proportional to 36,259.20, 54,388.80 and 20,678.40

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Solution

The fourth proportional to 36,259.20, 54,388.80 and 20,678.40 is: 31,017.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,259.20 : 54,388.80 = 20,678.40 : x
  2. Step 2: Convert to fraction form
    36,259.20/54,388.80 = 20,678.40/x
  3. Step 3: Cross multiply
    36,259.20x = 54,388.80 × 20,678.40
  4. Step 4: Simplify right side
    36,259.20x = 1,124,673,361.92
  5. Step 5: Solve for x
    x = 1,124,673,361.92/36,259.20
  6. Step 6: Final answer
    x = 31,017.60

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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.