Home / 18,720.30-28,080.45-5,577.24

Finding the Fourth Proportional to 18,720.30, 28,080.45 and 5,577.24

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Solution

The fourth proportional to 18,720.30, 28,080.45 and 5,577.24 is: 8,365.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.30 : 28,080.45 = 5,577.24 : x
  2. Step 2: Convert to fraction form
    18,720.30/28,080.45 = 5,577.24/x
  3. Step 3: Cross multiply
    18,720.30x = 28,080.45 × 5,577.24
  4. Step 4: Simplify right side
    18,720.30x = 156,611,408.96
  5. Step 5: Solve for x
    x = 156,611,408.96/18,720.30
  6. Step 6: Final answer
    x = 8,365.86

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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.