Home / 11,121.90-16,682.85-10,903.20

Finding the Fourth Proportional to 11,121.90, 16,682.85 and 10,903.20

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Solution

The fourth proportional to 11,121.90, 16,682.85 and 10,903.20 is: 16,354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.90 : 16,682.85 = 10,903.20 : x
  2. Step 2: Convert to fraction form
    11,121.90/16,682.85 = 10,903.20/x
  3. Step 3: Cross multiply
    11,121.90x = 16,682.85 × 10,903.20
  4. Step 4: Simplify right side
    11,121.90x = 181,896,450.12
  5. Step 5: Solve for x
    x = 181,896,450.12/11,121.90
  6. Step 6: Final answer
    x = 16,354.80

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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.