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Finding the Fourth Proportional to 7,184.76, 10,777.31 and 1,990.68

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Solution

The fourth proportional to 7,184.76, 10,777.31 and 1,990.68 is: 2,986.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,184.76 : 10,777.31 = 1,990.68 : x
  2. Step 2: Convert to fraction form
    7,184.76/10,777.31 = 1,990.68/x
  3. Step 3: Cross multiply
    7,184.76x = 10,777.31 × 1,990.68
  4. Step 4: Simplify right side
    7,184.76x = 21,454,175.47
  5. Step 5: Solve for x
    x = 21,454,175.47/7,184.76
  6. Step 6: Final answer
    x = 2,986.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.