Home / 18,720.38-28,080.88-6,240.24

Finding the Fourth Proportional to 18,720.38, 28,080.88 and 6,240.24

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Solution

The fourth proportional to 18,720.38, 28,080.88 and 6,240.24 is: 9,360.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.38 : 28,080.88 = 6,240.24 : x
  2. Step 2: Convert to fraction form
    18,720.38/28,080.88 = 6,240.24/x
  3. Step 3: Cross multiply
    18,720.38x = 28,080.88 × 6,240.24
  4. Step 4: Simplify right side
    18,720.38x = 175,231,415.01
  5. Step 5: Solve for x
    x = 175,231,415.01/18,720.38
  6. Step 6: Final answer
    x = 9,360.46

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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.