Home / 53,980.10-80,912.55-20,687.30

Finding the Fourth Proportional to 53,980.10, 80,912.55 and 20,687.30

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Solution

The fourth proportional to 53,980.10, 80,912.55 and 20,687.30 is: 31,008.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,980.10 : 80,912.55 = 20,687.30 : x
  2. Step 2: Convert to fraction form
    53,980.10/80,912.55 = 20,687.30/x
  3. Step 3: Cross multiply
    53,980.10x = 80,912.55 × 20,687.30
  4. Step 4: Simplify right side
    53,980.10x = 1,673,862,195.62
  5. Step 5: Solve for x
    x = 1,673,862,195.62/53,980.10
  6. Step 6: Final answer
    x = 31,008.88

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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.