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Finding the Fourth Proportional to 5,776.81, 7,972 and 3,124.22

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Solution

The fourth proportional to 5,776.81, 7,972 and 3,124.22 is: 4,311.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,776.81 : 7,972 = 3,124.22 : x
  2. Step 2: Convert to fraction form
    5,776.81/7,972 = 3,124.22/x
  3. Step 3: Cross multiply
    5,776.81x = 7,972 × 3,124.22
  4. Step 4: Simplify right side
    5,776.81x = 24,906,281.84
  5. Step 5: Solve for x
    x = 24,906,281.84/5,776.81
  6. Step 6: Final answer
    x = 4,311.42

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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.