Home / 7,421.09-10,245.42-6,424.79

Finding the Fourth Proportional to 7,421.09, 10,245.42 and 6,424.79

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Solution

The fourth proportional to 7,421.09, 10,245.42 and 6,424.79 is: 8,869.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.09 : 10,245.42 = 6,424.79 : x
  2. Step 2: Convert to fraction form
    7,421.09/10,245.42 = 6,424.79/x
  3. Step 3: Cross multiply
    7,421.09x = 10,245.42 × 6,424.79
  4. Step 4: Simplify right side
    7,421.09x = 65,824,620.73
  5. Step 5: Solve for x
    x = 65,824,620.73/7,421.09
  6. Step 6: Final answer
    x = 8,869.95

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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.