Home / 7,215.72-9,957.60-4,028.88

Finding the Fourth Proportional to 7,215.72, 9,957.60 and 4,028.88

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Solution

The fourth proportional to 7,215.72, 9,957.60 and 4,028.88 is: 5,559.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.72 : 9,957.60 = 4,028.88 : x
  2. Step 2: Convert to fraction form
    7,215.72/9,957.60 = 4,028.88/x
  3. Step 3: Cross multiply
    7,215.72x = 9,957.60 × 4,028.88
  4. Step 4: Simplify right side
    7,215.72x = 40,117,975.49
  5. Step 5: Solve for x
    x = 40,117,975.49/7,215.72
  6. Step 6: Final answer
    x = 5,559.80

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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.