Home / 8,631.12-11,910.72-4,905.12

Finding the Fourth Proportional to 8,631.12, 11,910.72 and 4,905.12

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Solution

The fourth proportional to 8,631.12, 11,910.72 and 4,905.12 is: 6,768.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.12 : 11,910.72 = 4,905.12 : x
  2. Step 2: Convert to fraction form
    8,631.12/11,910.72 = 4,905.12/x
  3. Step 3: Cross multiply
    8,631.12x = 11,910.72 × 4,905.12
  4. Step 4: Simplify right side
    8,631.12x = 58,423,510.89
  5. Step 5: Solve for x
    x = 58,423,510.89/8,631.12
  6. Step 6: Final answer
    x = 6,768.94

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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.