Home / 21,028.50-31,548.41-6,990.80

Finding the Fourth Proportional to 21,028.50, 31,548.41 and 6,990.80

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Solution

The fourth proportional to 21,028.50, 31,548.41 and 6,990.80 is: 10,488.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,028.50 : 31,548.41 = 6,990.80 : x
  2. Step 2: Convert to fraction form
    21,028.50/31,548.41 = 6,990.80/x
  3. Step 3: Cross multiply
    21,028.50x = 31,548.41 × 6,990.80
  4. Step 4: Simplify right side
    21,028.50x = 220,548,431.93
  5. Step 5: Solve for x
    x = 220,548,431.93/21,028.50
  6. Step 6: Final answer
    x = 10,488.07

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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.