Home / 21,183.89-31,737.10-9,918.56

Finding the Fourth Proportional to 21,183.89, 31,737.10 and 9,918.56

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Solution

The fourth proportional to 21,183.89, 31,737.10 and 9,918.56 is: 14,859.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.89 : 31,737.10 = 9,918.56 : x
  2. Step 2: Convert to fraction form
    21,183.89/31,737.10 = 9,918.56/x
  3. Step 3: Cross multiply
    21,183.89x = 31,737.10 × 9,918.56
  4. Step 4: Simplify right side
    21,183.89x = 314,786,303.30
  5. Step 5: Solve for x
    x = 314,786,303.30/21,183.89
  6. Step 6: Final answer
    x = 14,859.70

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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.