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Finding the Fourth Proportional to 5,679.81, 7,841.95 and 5,080.43

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Solution

The fourth proportional to 5,679.81, 7,841.95 and 5,080.43 is: 7,014.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.81 : 7,841.95 = 5,080.43 : x
  2. Step 2: Convert to fraction form
    5,679.81/7,841.95 = 5,080.43/x
  3. Step 3: Cross multiply
    5,679.81x = 7,841.95 × 5,080.43
  4. Step 4: Simplify right side
    5,679.81x = 39,840,484.94
  5. Step 5: Solve for x
    x = 39,840,484.94/5,679.81
  6. Step 6: Final answer
    x = 7,014.40

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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.