Home / 6,781.37-9,359.28-4,128.28

Finding the Fourth Proportional to 6,781.37, 9,359.28 and 4,128.28

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Solution

The fourth proportional to 6,781.37, 9,359.28 and 4,128.28 is: 5,697.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,781.37 : 9,359.28 = 4,128.28 : x
  2. Step 2: Convert to fraction form
    6,781.37/9,359.28 = 4,128.28/x
  3. Step 3: Cross multiply
    6,781.37x = 9,359.28 × 4,128.28
  4. Step 4: Simplify right side
    6,781.37x = 38,637,705.04
  5. Step 5: Solve for x
    x = 38,637,705.04/6,781.37
  6. Step 6: Final answer
    x = 5,697.63

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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.