Home / 21,183.39-31,768.11-7,139.63

Finding the Fourth Proportional to 21,183.39, 31,768.11 and 7,139.63

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Solution

The fourth proportional to 21,183.39, 31,768.11 and 7,139.63 is: 10,707.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.39 : 31,768.11 = 7,139.63 : x
  2. Step 2: Convert to fraction form
    21,183.39/31,768.11 = 7,139.63/x
  3. Step 3: Cross multiply
    21,183.39x = 31,768.11 × 7,139.63
  4. Step 4: Simplify right side
    21,183.39x = 226,812,630.62
  5. Step 5: Solve for x
    x = 226,812,630.62/21,183.39
  6. Step 6: Final answer
    x = 10,707.10

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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.