Home / 8,921.55-12,311.74-4,942.91

Finding the Fourth Proportional to 8,921.55, 12,311.74 and 4,942.91

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Solution

The fourth proportional to 8,921.55, 12,311.74 and 4,942.91 is: 6,821.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.55 : 12,311.74 = 4,942.91 : x
  2. Step 2: Convert to fraction form
    8,921.55/12,311.74 = 4,942.91/x
  3. Step 3: Cross multiply
    8,921.55x = 12,311.74 × 4,942.91
  4. Step 4: Simplify right side
    8,921.55x = 60,855,822.76
  5. Step 5: Solve for x
    x = 60,855,822.76/8,921.55
  6. Step 6: Final answer
    x = 6,821.22

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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.