Home / 6,781.53-9,359.37-4,128.78

Finding the Fourth Proportional to 6,781.53, 9,359.37 and 4,128.78

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Solution

The fourth proportional to 6,781.53, 9,359.37 and 4,128.78 is: 5,698.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,781.53 : 9,359.37 = 4,128.78 : x
  2. Step 2: Convert to fraction form
    6,781.53/9,359.37 = 4,128.78/x
  3. Step 3: Cross multiply
    6,781.53x = 9,359.37 × 4,128.78
  4. Step 4: Simplify right side
    6,781.53x = 38,642,779.67
  5. Step 5: Solve for x
    x = 38,642,779.67/6,781.53
  6. Step 6: Final answer
    x = 5,698.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.