Home / 7,028.80-9,724.32-6,875.20

Finding the Fourth Proportional to 7,028.80, 9,724.32 and 6,875.20

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Solution

The fourth proportional to 7,028.80, 9,724.32 and 6,875.20 is: 9,511.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,028.80 : 9,724.32 = 6,875.20 : x
  2. Step 2: Convert to fraction form
    7,028.80/9,724.32 = 6,875.20/x
  3. Step 3: Cross multiply
    7,028.80x = 9,724.32 × 6,875.20
  4. Step 4: Simplify right side
    7,028.80x = 66,856,644.86
  5. Step 5: Solve for x
    x = 66,856,644.86/7,028.80
  6. Step 6: Final answer
    x = 9,511.81

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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.