Home / 7,478.76-10,320.84-4,121.64

Finding the Fourth Proportional to 7,478.76, 10,320.84 and 4,121.64

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Solution

The fourth proportional to 7,478.76, 10,320.84 and 4,121.64 is: 5,687.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.76 : 10,320.84 = 4,121.64 : x
  2. Step 2: Convert to fraction form
    7,478.76/10,320.84 = 4,121.64/x
  3. Step 3: Cross multiply
    7,478.76x = 10,320.84 × 4,121.64
  4. Step 4: Simplify right side
    7,478.76x = 42,538,786.98
  5. Step 5: Solve for x
    x = 42,538,786.98/7,478.76
  6. Step 6: Final answer
    x = 5,687.95

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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.