Home / 10,318.64-15,469.56-5,121.68

Finding the Fourth Proportional to 10,318.64, 15,469.56 and 5,121.68

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Solution

The fourth proportional to 10,318.64, 15,469.56 and 5,121.68 is: 7,678.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,318.64 : 15,469.56 = 5,121.68 : x
  2. Step 2: Convert to fraction form
    10,318.64/15,469.56 = 5,121.68/x
  3. Step 3: Cross multiply
    10,318.64x = 15,469.56 × 5,121.68
  4. Step 4: Simplify right side
    10,318.64x = 79,230,136.06
  5. Step 5: Solve for x
    x = 79,230,136.06/10,318.64
  6. Step 6: Final answer
    x = 7,678.35

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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.