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Finding the Fourth Proportional to 55,783.20, 83,674.80 and 18,847.20

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Solution

The fourth proportional to 55,783.20, 83,674.80 and 18,847.20 is: 28,270.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,783.20 : 83,674.80 = 18,847.20 : x
  2. Step 2: Convert to fraction form
    55,783.20/83,674.80 = 18,847.20/x
  3. Step 3: Cross multiply
    55,783.20x = 83,674.80 × 18,847.20
  4. Step 4: Simplify right side
    55,783.20x = 1,577,035,690.56
  5. Step 5: Solve for x
    x = 1,577,035,690.56/55,783.20
  6. Step 6: Final answer
    x = 28,270.80

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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.