Home / 8,631.12-12,946.96-2,391.20

Finding the Fourth Proportional to 8,631.12, 12,946.96 and 2,391.20

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Solution

The fourth proportional to 8,631.12, 12,946.96 and 2,391.20 is: 3,586.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.12 : 12,946.96 = 2,391.20 : x
  2. Step 2: Convert to fraction form
    8,631.12/12,946.96 = 2,391.20/x
  3. Step 3: Cross multiply
    8,631.12x = 12,946.96 × 2,391.20
  4. Step 4: Simplify right side
    8,631.12x = 30,958,727.87
  5. Step 5: Solve for x
    x = 30,958,727.87/8,631.12
  6. Step 6: Final answer
    x = 3,586.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.