Home / 18,720.86-28,079.36-6,239.54

Finding the Fourth Proportional to 18,720.86, 28,079.36 and 6,239.54

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Solution

The fourth proportional to 18,720.86, 28,079.36 and 6,239.54 is: 9,358.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.86 : 28,079.36 = 6,239.54 : x
  2. Step 2: Convert to fraction form
    18,720.86/28,079.36 = 6,239.54/x
  3. Step 3: Cross multiply
    18,720.86x = 28,079.36 × 6,239.54
  4. Step 4: Simplify right side
    18,720.86x = 175,202,118.30
  5. Step 5: Solve for x
    x = 175,202,118.30/18,720.86
  6. Step 6: Final answer
    x = 9,358.66

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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.