Home / 8,921.63-12,311.85-5,384.84

Finding the Fourth Proportional to 8,921.63, 12,311.85 and 5,384.84

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Solution

The fourth proportional to 8,921.63, 12,311.85 and 5,384.84 is: 7,431.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.63 : 12,311.85 = 5,384.84 : x
  2. Step 2: Convert to fraction form
    8,921.63/12,311.85 = 5,384.84/x
  3. Step 3: Cross multiply
    8,921.63x = 12,311.85 × 5,384.84
  4. Step 4: Simplify right side
    8,921.63x = 66,297,280.79
  5. Step 5: Solve for x
    x = 66,297,280.79/8,921.63
  6. Step 6: Final answer
    x = 7,431.08

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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.