Home / 5,679.90-7,838.28-3,161.88

Finding the Fourth Proportional to 5,679.90, 7,838.28 and 3,161.88

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Solution

The fourth proportional to 5,679.90, 7,838.28 and 3,161.88 is: 4,363.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.90 : 7,838.28 = 3,161.88 : x
  2. Step 2: Convert to fraction form
    5,679.90/7,838.28 = 3,161.88/x
  3. Step 3: Cross multiply
    5,679.90x = 7,838.28 × 3,161.88
  4. Step 4: Simplify right side
    5,679.90x = 24,783,700.77
  5. Step 5: Solve for x
    x = 24,783,700.77/5,679.90
  6. Step 6: Final answer
    x = 4,363.40

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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.