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Finding the Fourth Proportional to 53,481.32, 80,220.89 and 18,420.20

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Solution

The fourth proportional to 53,481.32, 80,220.89 and 18,420.20 is: 27,629.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,481.32 : 80,220.89 = 18,420.20 : x
  2. Step 2: Convert to fraction form
    53,481.32/80,220.89 = 18,420.20/x
  3. Step 3: Cross multiply
    53,481.32x = 80,220.89 × 18,420.20
  4. Step 4: Simplify right side
    53,481.32x = 1,477,684,482.92
  5. Step 5: Solve for x
    x = 1,477,684,482.92/53,481.32
  6. Step 6: Final answer
    x = 27,629.92

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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.