Home / 20,981.53-31,473.66-5,399.16

Finding the Fourth Proportional to 20,981.53, 31,473.66 and 5,399.16

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Solution

The fourth proportional to 20,981.53, 31,473.66 and 5,399.16 is: 8,099.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.53 : 31,473.66 = 5,399.16 : x
  2. Step 2: Convert to fraction form
    20,981.53/31,473.66 = 5,399.16/x
  3. Step 3: Cross multiply
    20,981.53x = 31,473.66 × 5,399.16
  4. Step 4: Simplify right side
    20,981.53x = 169,931,228.35
  5. Step 5: Solve for x
    x = 169,931,228.35/20,981.53
  6. Step 6: Final answer
    x = 8,099.09

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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.