Home / 7,485.70-10,329.82-4,128.55

Finding the Fourth Proportional to 7,485.70, 10,329.82 and 4,128.55

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Solution

The fourth proportional to 7,485.70, 10,329.82 and 4,128.55 is: 5,697.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,485.70 : 10,329.82 = 4,128.55 : x
  2. Step 2: Convert to fraction form
    7,485.70/10,329.82 = 4,128.55/x
  3. Step 3: Cross multiply
    7,485.70x = 10,329.82 × 4,128.55
  4. Step 4: Simplify right side
    7,485.70x = 42,647,178.36
  5. Step 5: Solve for x
    x = 42,647,178.36/7,485.70
  6. Step 6: Final answer
    x = 5,697.15

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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.