Home / 21,029.72-31,544.46-6,990.80

Finding the Fourth Proportional to 21,029.72, 31,544.46 and 6,990.80

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Solution

The fourth proportional to 21,029.72, 31,544.46 and 6,990.80 is: 10,486.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,029.72 : 31,544.46 = 6,990.80 : x
  2. Step 2: Convert to fraction form
    21,029.72/31,544.46 = 6,990.80/x
  3. Step 3: Cross multiply
    21,029.72x = 31,544.46 × 6,990.80
  4. Step 4: Simplify right side
    21,029.72x = 220,521,010.97
  5. Step 5: Solve for x
    x = 220,521,010.97/21,029.72
  6. Step 6: Final answer
    x = 10,486.16

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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.