Home / 8,621.13-12,931.70-2,381.20

Finding the Fourth Proportional to 8,621.13, 12,931.70 and 2,381.20

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Solution

The fourth proportional to 8,621.13, 12,931.70 and 2,381.20 is: 3,571.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,621.13 : 12,931.70 = 2,381.20 : x
  2. Step 2: Convert to fraction form
    8,621.13/12,931.70 = 2,381.20/x
  3. Step 3: Cross multiply
    8,621.13x = 12,931.70 × 2,381.20
  4. Step 4: Simplify right side
    8,621.13x = 30,792,964.04
  5. Step 5: Solve for x
    x = 30,792,964.04/8,621.13
  6. Step 6: Final answer
    x = 3,571.80

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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.