Home / 21,010.92-31,516.38-12,245.80

Finding the Fourth Proportional to 21,010.92, 31,516.38 and 12,245.80

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Solution

The fourth proportional to 21,010.92, 31,516.38 and 12,245.80 is: 18,368.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.92 : 31,516.38 = 12,245.80 : x
  2. Step 2: Convert to fraction form
    21,010.92/31,516.38 = 12,245.80/x
  3. Step 3: Cross multiply
    21,010.92x = 31,516.38 × 12,245.80
  4. Step 4: Simplify right side
    21,010.92x = 385,943,286.20
  5. Step 5: Solve for x
    x = 385,943,286.20/21,010.92
  6. Step 6: Final answer
    x = 18,368.70

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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.