Home / 7,479.31-10,320.90-4,121.93

Finding the Fourth Proportional to 7,479.31, 10,320.90 and 4,121.93

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Solution

The fourth proportional to 7,479.31, 10,320.90 and 4,121.93 is: 5,687.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479.31 : 10,320.90 = 4,121.93 : x
  2. Step 2: Convert to fraction form
    7,479.31/10,320.90 = 4,121.93/x
  3. Step 3: Cross multiply
    7,479.31x = 10,320.90 × 4,121.93
  4. Step 4: Simplify right side
    7,479.31x = 42,541,975.73
  5. Step 5: Solve for x
    x = 42,541,975.73/7,479.31
  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.