Home / 7,420.18-11,128.50-2,153.80

Finding the Fourth Proportional to 7,420.18, 11,128.50 and 2,153.80

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Solution

The fourth proportional to 7,420.18, 11,128.50 and 2,153.80 is: 3,230.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.18 : 11,128.50 = 2,153.80 : x
  2. Step 2: Convert to fraction form
    7,420.18/11,128.50 = 2,153.80/x
  3. Step 3: Cross multiply
    7,420.18x = 11,128.50 × 2,153.80
  4. Step 4: Simplify right side
    7,420.18x = 23,968,563.30
  5. Step 5: Solve for x
    x = 23,968,563.30/7,420.18
  6. Step 6: Final answer
    x = 3,230.19

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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.