Home / 9,990.20-14,985.30-3,414.20

Finding the Fourth Proportional to 9,990.20, 14,985.30 and 3,414.20

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Solution

The fourth proportional to 9,990.20, 14,985.30 and 3,414.20 is: 5,121.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.20 : 14,985.30 = 3,414.20 : x
  2. Step 2: Convert to fraction form
    9,990.20/14,985.30 = 3,414.20/x
  3. Step 3: Cross multiply
    9,990.20x = 14,985.30 × 3,414.20
  4. Step 4: Simplify right side
    9,990.20x = 51,162,811.26
  5. Step 5: Solve for x
    x = 51,162,811.26/9,990.20
  6. Step 6: Final answer
    x = 5,121.30

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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.