Home / 7,112.21-9,815.04-3,925.60

Finding the Fourth Proportional to 7,112.21, 9,815.04 and 3,925.60

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Solution

The fourth proportional to 7,112.21, 9,815.04 and 3,925.60 is: 5,417.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.21 : 9,815.04 = 3,925.60 : x
  2. Step 2: Convert to fraction form
    7,112.21/9,815.04 = 3,925.60/x
  3. Step 3: Cross multiply
    7,112.21x = 9,815.04 × 3,925.60
  4. Step 4: Simplify right side
    7,112.21x = 38,529,896.49
  5. Step 5: Solve for x
    x = 38,529,896.49/7,112.21
  6. Step 6: Final answer
    x = 5,417.43

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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.